Difference between revisions of "Chem321:Discussion 4"

From WikiChem
Jump to: navigation, search
(Laws of conservation of matter and energy)
(Laws of conservation of matter and energy)
 
(78 intermediate revisions by 9 users not shown)
Line 1: Line 1:
 
{{Chem321 navigation}}
 
{{Chem321 navigation}}
This discussion is based on discussing three questions, and it is set to take place on the wiki, over the next few days (until midnight on Wednesday, 17th July).  Please leave one original answer to each question on the page below, then also a total of two comments in response to (and under) the comments by other students.  Be sure to start your text with a *, and sign your responses with four tilde marks at the end.
+
This discussion is based on discussing three questions, and it is set to take place on the wiki, over the next few days.  You have until midnight on Wednesday, 15th July to post your initial direct answer to each of the questions.  Then, by Friday, 17th July, you should post at least two comments in response to (and under) the comments by other students.  Be sure to start your text with a *, and sign your responses with four tilde marks at the end.
  
 
==Laws of conservation of matter and energy==
 
==Laws of conservation of matter and energy==
Line 8: Line 8:
  
  
*I think that the lesson that is most apparent, at least from my particular perspective, and in considering both Hill as well as the Unit 2 & 3 ppt. which focus on the ideas of sustainability and energy, is that where energy is not destroyed only dissipated, and in utilizing various technological advancements, that it is entirely possible to re-direct the flow of dissipated energy such that we are constantly redistributing and reabsorbing rather than discharging it. For instance, and in reference to our scenario involving ACME Chemical, much of the waste produced by plants like ACME is redirected or reused. I think that if we consider energy in the same way, much like the way in which energy is contained in and flows from an ocean wave, we can actualize a more efficient management of the energy produced through renewable rather than non-renewable resources thereby decreasing the negative impact on the ecosystem.[[User:Haw7thorne|Haw7thorne]] ([[User talk:Haw7thorne|talk]]) 21:44, 16 July 2013 (EDT)[[User:Haw7thorne|Haw7thorne]] ([[User talk:Haw7thorne|talk]])
+
*From the Law of Conservation of mass and energy, we must consider several things when discussing global resources.  In order to conserve mass and energy on a global scale, we must implement and use renewable resources that we have on hand. For example, we have seen that wind mills and wind turbines are a great source for creating energy at low cost.  It may be costly to make a wind turbine and implement this into a certain location, but it will undoubtedly save money in the long term. Additionally, we must not use more energy than we have have and what we can make. We are expending our resources at a rapid rate, and it is necessary to scale back on a global scale, in order for our resources, land, and capital to last decades and centuries into the future.[[User:LeannaCollard|LeannaCollard]] ([[User talk:LeannaCollard|talk]]) 20:17, 13 July 2015 (EDT)
  
*The lessons we can learn from both the conservation of mass and the conservation of energy laws are ones that can be applied to sustainability and the use and productivity of the materials we use. In relationship to the conservation of mass we can apply this to sustainability by understanding that what mass we start out with is the same mass that we will end up with after the reaction. Mass cannot be created nor destroyed and we can't aim for creating a reaction that produces less waste or a reaction that produces more product. We must though aim for a reaction that gives us the best percent yield of the product we are searching for, with minimum to no harmful waste at all. With the conservation of energy, which states that whatever energy you put into a system you will get in return, we should again shoot for using less energy than we need to to get what we need out of it. If there was a way to recycle the energy put out from a reaction to again power the initial reaction we could have an endless cycle of energy formation. This is why renewable resources are so valuable. [[User:Slomasa192|Slomasa192]] ([[User talk:Slomasa192|talk]]) 12:40, 17 July 2013 (EDT)
 
  
*The law of conservation of energy shows the potential of naturally occuring energy. For example, the global resource of solar energy creates a renewable resource that can not be destroyed. This energy can be used for endless daily activities and would be replacing energy from non renewable resources. Although energy is never destroyed, the waste it produces when burnt is not usable and hurts the environment while waste from solar energy does not do this. The supply of solar energy is also inexhaustible and readily available in most circumstances. ([[User:Magenta|Magenta]] ([[User talk:Magenta|talk]]) 13:41, 17 July 2013 (EDT))
+
::*Yes, we're expending resources of ''stored'' solar energy, and once they're gone it will take millions of years to replace; the wind power is taking the energy at the time it's generated from the sun, without depleting any stored energy.[[User:Walkerma|Martin A. Walker]] ([[User talk:Walkerma|talk]]) 13:49, 16 July 2015 (EDT)  
  
*From laws of thermodynamics, implying that mass and energy can be neither created nor destroyed, we may be able to keep some very useful concepts in mind. Firstly, any process requiring the input of a given mass input of materials will then invariably output a mirrored mass of product and waste materials. So when designing a process, it is important to consider the matter that is left unused or as waste of the process in relation to the materials initially used in the first place. Furthermore, because energy is conserved, one can also take into account the efficiency of machines according to the amount of heat or mechanical work that a certain quantity of fuel could idealistically provide for that machine. Less heat or mechanical work that dissipates into the surrounding environment can allow for more efficient engines. [[User:Tom.fuchs|Tom.fuchs]] ([[User talk:Tom.fuchs|talk]]) 14:39, 18 July 2013 (EDT)
+
 
 +
::*how do you think we could cut back on a global scale?  Would this change occur at a fast rate or do you think our current efforts are suitable enough? [[User:Rodrigaf197|Rodrigaf197]] ([[User talk:Rodrigaf197|talk]]) 16:46, 17 July 2015 (EDT)
 +
 
 +
 
 +
*Although energy and matter can neither be created nor destroyed, it is imperative that we rationally and respectfully manage global energy and material resources. This is due to the fact that there are many irreversible reactions, such as the combustion of gasoline in an automobile. The combustion of the chemical energy from the hydrocarbon is converted into mechanical energy (moving the car), and consequently produces water and carbon dioxide (as the mass of the reactants must equal that of the products). However, going from the products (CO2 and H2O) back to the reactants (hydrocarbon and oxygen) is not feasible. Thus, this example highlights the dire need to appropriately conserve global resources, and to adequately focus on the effectuation and development of more renewable and sustainable technologies (and behaviors conducive to the success of future generations). [[User:Alexanderlevitz|Alexanderlevitz]] ([[User talk:Alexanderlevitz|talk]]) 17:03, 15 July 2015 (EDT)
 +
 
 +
 
 +
::*You're right - it is in effect irreversible.  Human beings aren't so easily "trained", though!  Certainly we need to educate people and foster the good choices, but we need also to ensure that society as a whole doesn't keep using fossil fuels; that could involve a combination of regulation, incentives and technology, as well as international agreement.[[User:Walkerma|Martin A. Walker]] ([[User talk:Walkerma|talk]]) 13:49, 16 July 2015 (EDT)
 +
 
 +
 
 +
* If we look at the conservation of mass and conservation of energy we can learn a few things when considering global resources of mass and energy. Due to the conservation of energy and mass we know that these things are limited and cannot created more.therefore we must actively conserve the resources that we have present on earth, because even though these things cannot be destroyed sometimes they cannot be changed back into something that we see as useful to us either. once this happens we are such with the waste that we do not want, and less of the product that we had started with. This also shows us that we need to use processes that have a high efficiency and high yield when considering how to create or make different products. Finally we can also learn that there is only so much energy available, and finding the greenest most effective way to harness this energy will make it so that we make less impact on our environment and that the world will still be around for future generations.[[User:Rileytc197|Rileytc197]] ([[User talk:Rileytc197|talk]]) 17:51, 15 July 2015 (EDT)
 +
 
 +
 
 +
::*Yes - it's a good idea to try and use what we have more efficiently!  I always recall my chem professor saying (in 1980 or so, when I had a whole eight-lecture class on petroleum chemistry) that it was such a waste just to burn petroleum, when it's such a wonderful source of useful chemicals![[User:Walkerma|Martin A. Walker]] ([[User talk:Walkerma|talk]]) 13:49, 16 July 2015 (EDT) 
 +
 
 +
 
 +
*Conservation of mass and conservation of energy are not serious issues for our planet. In order for conservation of mass to be an issue, more mass would have to escape the atmosphere, such as spacecraft,than enters the atmosphere, such as colliding comets and meteorites. For Conservation of energy to be an issue, we would have to be radiating more energy out into space than we are taking in from it, predominantly from the sun. What we do have to worry about, is the makeup of that mass. The elements that mass is made up of, the molecules those elements are organized into, and their arraggement in the core, crust, and atmosphere of the planet.[[User:Gallaggc196|Gallaggc196]] ([[User talk:Gallaggc196|talk]]) 20:23, 15 July 2015 (EDT)
 +
 
 +
 
 +
::*A good point to raise!  You're absolutely right about conservation of total mass, and that it's what elements make up that mass that is important.  We're not running out of mass, but we might conceivably run out of affordable sources of (say) platinum or niobium.  (The law does in fact imply that for chemical processes; you can't process 1 tonne of niobium from rocks and get 2 tonnes of niobium out of it!)  However, on energy I think you're avoiding a key point; we as a species use up a lot of energy - way beyond what we get just from food - to stay warm/cool, for transportation, industry, agriculture, etc.  What matters here is the '''exergy''' (see Hill).  Energy can do work when it's in petroleum, or solar radiation (if we have solar panels), but once we burn our gasoline it becomes low grade heat which can no longer be used - it just warms the planet a little.  The Second Law of Thermodynamics gets in the way!  To be sustainable, we ultimately are limited to the amount of energy we can harness from the Sun/Moon and from the heat inside the Earth, or from nuclear power, with the Sun being the major source.  See Rodrigaf197's post below - she puts it beautifully! [[User:Walkerma|Martin A. Walker]] ([[User talk:Walkerma|talk]]) 13:49, 16 July 2015 (EDT)
 +
 
 +
 
 +
::::*Yeah, I thought that might not be the real point of the question, but while we do use up a great deal of exergy, we don't really "use up" energy, and I figured I should answer the question as written in case you were trying to make sure we had been doing the reading and understood that matter and energy cannot be created or destroyed (I understand that it is possible to convert mass into energy and perhaps the other way but you know what I mean).[[User:Gallaggc196|Gallaggc196]] ([[User talk:Gallaggc196|talk]]) 23:45, 17 July 2015 (EDT)
 +
 
 +
 
 +
*Knowing that mass and energy can neither be created nor destroyed, we should learn to do the same with our resources. We should make sure that our resources are being reused and remade into different things instead of just trashing them and letting them slowly rot away and harm the environment. We need to become well informed about how to reuse and repurpose what we think is garbage. If people only knew how long it took for some our garbage to degrade, I believe we wouldn’t throw so much of it in the trash. [[User:Ruizja196|Ruizja196]] ([[User talk:Ruizja196|talk]]) 23:10, 15 July 2015 (EDT)
 +
 
 +
 
 +
::*Nice idea to focus on reuse/repurpose (and recycling, too, I'd say). - although the Earth does have huge amounts of mass in general, the materials we use are often very specific, and they contain large amounts of exergy. Reuse, etc. ensures frugal use of the natural capital we have in both matter and energy.[[User:Walkerma|Martin A. Walker]] ([[User talk:Walkerma|talk]]) 13:49, 16 July 2015 (EDT)
 +
 
 +
 
 +
::*I agree with this statement that it is very important that as humans we are consciously aware of our decisions in regards to our resources and being responsibile with them. I believe that as habitants of Earth, we should be responsibility recycling every opportunity that we have. Additionally, there are many materials that we can reuse that such as plastic, certain metals, paper, and many more. I think it is also important that we educate members of society about how long it takes materials to break down. Some materials may not even break down in our lifetime so it is important that people know the significance of their actions and the consequences that arise. [[User:LeannaCollard|LeannaCollard]] ([[User talk:LeannaCollard|talk]]) 09:17, 16 July 2015 (EDT)
 +
 
 +
 
 +
::*I think that this is very true we need to definitely look into making sure everyone is informed about reusing our resources, we only get one planet and it only has so much of a given resource on it. we need to be conscious about that, and learn to be not wasteful with our resources.[[User:Rileytc197|Rileytc197]] ([[User talk:Rileytc197|talk]]) 00:11, 18 July 2015 (EDT)
 +
 
 +
 
 +
*When looking at the laws of thermodynamics it is important to understand how they apply to our planet and they help explain how life is able to sustain itself. The first law tells us that energy is conserved therefore the amount in the universe is constant, so this means it can only transform from one form to another. This helps us understand that energy cannot be consumed, rather it is quantized and distributed into different microstates which can be seen as vibrational, rotational, and translational motion within molecules. This brings us to the second law which states that spontaneous processes happen in one direction and are accompanied by an increase in entropy, which can be seen as energy being distributed in more ways and thus occupying many more smaller quantum states. This applies to our planet in that we are open systems which allows for the movement of energy and matter thus counteracting the spontaneity and entropy increase. We must use our resources in a way that will contain stored energy and prevent decay since they are not in equilibrium. In doing so we decreased the entropy of the object but increase the entropy in the environment.  These laws can help us understand how to develop sustainable systems that minimize the harm on the environment. [[User:Rodrigaf197|Rodrigaf197]] ([[User talk:Rodrigaf197|talk]]) 23:43, 15 July 2015 (EDT)
 +
 
 +
 
 +
::*Although this answer focuses more generally on the thermodynamics (esp. the 2nd law) rather than just the conservation of mass-energy, this is an extremely perceptive and insightful post!  You are dead on.  Maybe next year I'll ask more about the second law?  Well done! [[User:Walkerma|Martin A. Walker]] ([[User talk:Walkerma|talk]]) 13:49, 16 July 2015 (EDT)
 +
 
 +
 
 +
*The Law of conservation of matter and energy, states that the total amount of energy in the universe is constant, which means that all of the energy has to end up somewhere, either in the original form or in a different form. We can use this knowledge to determine the energy efficiency of the system. Many environmental problems are associated with burning fossil fuels for energy. The combustion reaction of a fossil fuel with oxygen releases water, carbon dioxide, and any impurities contained in the resource into the environment. Humans have used most of the fossil fuel reserves over the past 200 years. While we are still using up fossil fuels we have also started to look towards many types of renewable resources.  Humans have learned to take advantage these different forms of renewable resources, including: solar power, hydropower, wind power, and geothermal energy. [[User:Visserjr199|Visserjr199]] ([[User talk:Visserjr199|talk]]) 16:10, 16 July 2015 (EDT)
  
 
==Limitations==
 
==Limitations==
 
'''Science is clearly valuable when studying the environment.  What do you perceive as the limitations of science in this context?'''
 
'''Science is clearly valuable when studying the environment.  What do you perceive as the limitations of science in this context?'''
  
*Science has clearly shown itself to be invaluable to not only sustaining, but improving the quality of human life. The development and utilization of crop rotation and Jethro Tull's (no, not the band) seed drill in England beget the Agricultural Revolution in that country; as well as the concurrent surge in population needed to set the ground work for the Industrial Revolution which followed. From Hypocrites rational medicine, and Eli Whitney's cotton gin, to Edison's incandescent light bulb, Gutenberg's printing press, Edward Jenner's vaccination method for smallpox, Lister's antiseptic surgery, Flemming's discovery of penicillin, and Norman Borlaug's dwarf wheat it is impossible to deny that science (and by extension, technology) has not only extended the life expectancy of our species, but improved the conditions for living for billions, perhaps even trillions of human beings all over the planet. However, while science has proven itself to be the progenitor of a veritable explosion of advancement in technology, medicine, agriculture and industry it has very definite limitations in being altogether unable to account for what it has not yet experienced and therefore what it cannot possibly foresee or know. That is to say, while the development of antibiotics like amoxicillin for instance have served to alleviate and counter the symptoms of various bacterial infections, some common bacteria are now beginning to develop a resistance to many of what had been hailed as wonder drugs in their infancy. And soon many of those bacterial infections which we had been happy to relegate to a dark time long past will have made a horrifying resurgence. As a result, where it had been the practice of medical professionals to simply prescribe an antibiotic, they are in response now advocating better hygiene and infection control rather than simply prescribing or over-prescribing things like penicillin. So there are some very definite limitations to scientific progress, but they limitations which have at the same time generated new and more efficient methods for addressing infection and disease for example.[[User:Haw7thorne|Haw7thorne]] ([[User talk:Haw7thorne|talk]]) 22:50, 16 July 2013 (EDT)
 
  
*As of right now it is tough to see is there are any limitations to the way science can be valuable to the environment. Science is ever changing, in every field, and everyday new things are being discovered and new techniques are being pioneered to improve man kinds relationship with the environment. There is so much that we as human beings and as collaborators with the environment still have to learn and everyday is a new and important challenge. I do though on the other hand have questions about how modern man is affecting science and how history has changed itself over time, especially the last 50 or 60 years. One theory I have come to ponder lately, due in part to my Microbiology class with Dr. Plague, is that maybe our innovation in the field of medicine and technology has created a scenario where there will never be any limitations. Now I know this idea may be crazy and a little off the topic of the but I feel that we, human beings, are an essential part of this. We had learned about the Red Queen hypothesis and how humans are in a "race" against pathogens to keep up with their ever evolving nature. Now my hypothesis is that with this race we as humans have stunted our evolution, that we are no longer allowing the environment and our pathogenic counterparts to "weed" out the least adapted organisms. This has then allowed the pathogens to not be sufficient in the current state they are in and pushes them to evolve faster than us. Since we strive to live longer and increase the quality of life we have more people on the planet which in turn means we are using our resources faster than we expected. If we look at population curves of the world over the last 12,000 years we see that at some point there was a major explosion of population growth sometime in the early 20th century. This could be linked to Fleming's discovery of Penicillin in 1928. With this discovery man has strived to determine the cure for everything they can, but has this determination led to us ultimately playing god and changing evolution and the environment as a whole? With this in mind and the Red Queen Hypothesis there will never be any limitations to studying the environment because we are constantly changing what the environment is and will become. [[User:Slomasa192|Slomasa192]] ([[User talk:Slomasa192|talk]]) 13:07, 17 July 2013 (EDT)
+
*Science is what we believe to be true here and now. We have learned over decades and centuries that was once believed as true, certainly may not be.  The limitation to science in this context is that what we believe to be accurate and true today, may not be accurate and true fifty years from now. There will be great advancements in technology that may enhance our belief or prove it to be false all together. It is naive of us to say that what we believe is 100% true and always will be. The great thing about science is that it is a process and it is always evolving. [[User:LeannaCollard|LeannaCollard]] ([[User talk:LeannaCollard|talk]]) 20:17, 13 July 2015 (EDT)
 +
 
 +
 
 +
::*I think science is more than just a belief, which makes it sound like anyone can believe what they like.  You can't design technology - say a cellphone - if you don't accept the current theories; if you apply hundreds of pieces of our current scientific knowledge together, the cellphone works, and is an amazing piece of technology. It is certainly true, though, that many of our current theories will need to be revised as time goes on.  That can be a strength - the comparative openness of scientists to accept change, based on experiments and data.  It is also true that often scientists don't ''know'' things as facts - e.g., what color Tyrannosaurus skin was - but they often speculate based on limited knowledge and their hypotheses (which are important) are then presented as "fact" in books.  I find it hard to accept, though, that we will decide in the future that water is no longer one oxygen bonded to two hydrogens![[User:Walkerma|Martin A. Walker]] ([[User talk:Walkerma|talk]]) 23:38, 16 July 2015 (EDT)
 +
 
 +
 
 +
* When it comes to science and the environment there are a few limitations that are present. The main limitation that is present is the fact that science is based on what is know at the time, if the information is incorrect or not fully there than we cannot base a correct assumption on that science. Also the fact that nowadays with the internet and all of the media that we have false science or science that has been changed to make look a certain way is also a big thing. this means that some people who are honest will see the correlation in the data about the environment, while those being paid to say otherwise falsify data or change it to support what they want. [[User:Rileytc197|Rileytc197]] ([[User talk:Rileytc197|talk]]) 19:46, 15 July 2015 (EDT)
 +
 
 +
 
 +
::*Science does operate in society, and society can have powerful factions that may not like some conclusions that scientists come to - for example, the church had a hard time accepting that the Earth went round the Sun.  So this type of misinformation is nothing new, though the postmodernist viewpoint we often hear today likes to say that "my view of the science is as equally valid as yours."  It is not, if you're claiming that the formula for water is HO (as Dalton believed) rather than H<sub>2</sub>O.  Ultimately, science is based on reason, logic, experimental data and prediction, and as long as the scientific community builds on that it remains strong. However, there are many areas - such as climate and biology, two areas experiencing controversy - where it is almost impossible to conclusively ''prove'' that climate change is man-made, say; even though there is very strong evidence to suggest it is, there is a real (but I would say very small) possibility that climate change has another cause, or is perhaps not even happening at all.  What a scientist should do in such circumstances is use the most reasonable hypothesis and work with that - but of cause the devil lies in that word "reasonable"!  It should mean that the weight of experimental data support it, but all of us can have beliefs that can make us evaluate the evidence differently.[[User:Walkerma|Martin A. Walker]] ([[User talk:Walkerma|talk]]) 23:38, 16 July 2015 (EDT)
 +
 
 +
 
 +
*The limitations of science in this context revolve around human knowledge and the limits of the physical world. Many of our problems can be overcome by technology. Human life was improved drastically by the industrial revolution and many of the things that have come from it and come after it. Factories and the machines inside them grew economies by creating more products at higher quality and consistency while also doing it  more quickly and with greater frequency. Information technologies allowed for more rapid and reliable transmission of data and information, connecting the now wealthy world like it never had been before. Now as we have seen the effects our progress is having on our home we have turned our attention to saving it. Green technologies have emerged in the form of solar power, wind power, geothermal power, and to an extent, nuclear power. With greater application of these technologies and more research to improve their efficiency, we can significantly reduce the negative impact we have on the planet. However, everything comes back to the science and science is dependent on one thing, data. We need testable, comprehensible, data. The amount of data we have and and the amount of that we can use is dependent on how much relevant data exists ultimately, but more realistically it is dependent on our ability to gather and analyze it. As this improves, technology will improve with it, and devices such as solar panels and wind turbines will improve as well. The other limit, the physical world, is composed of things such as the amount of energy emited by the sun, the ammount of space on the earth that can be covered in solar panels, the speed of the wind, and the total number of turbines that can be placed on the planets surface. While human knowledge can be improved, the limits of the physical world cannot, so while human knowledge is a "soft limit" on science, the limits of the physical world are a "hard limit".[[User:Gallaggc196|Gallaggc196]] ([[User talk:Gallaggc196|talk]]) 21:37, 15 July 2015 (EDT)
 +
 
 +
 
 +
::*A very interesting post, and your closing sentence is beautifully written!  Well done!  One thing the information revolution & internet have allowed us to do is to (a) handle orders of magnitude more data at a time, and (b) share those data across the world, so we can put things together in new ways. We've barely begun to reap the benefits of that in our science.  Of course, science and technology can both be used for harmful purposes as well; the industrial revolution also produced the carnage of modern wars, and WW1 in particular IMHO.  We need to make sure the technology serves us well.  Thanks, [[User:Walkerma|Martin A. Walker]] ([[User talk:Walkerma|talk]]) 23:38, 16 July 2015 (EDT)
 +
 
 +
 
 +
*Understanding the environment through the scientific process does have some inherent limitations. For example, there can be a number of confounding factors that make obtaining data, and a subsequent conclusion difficult or impossible. The complexity and breadth of the environment also complicates our ability to gain a comprehensive understanding of the environment. However, as technology continues to advance so will our capacity to comprehend and discover more about our environment. Furthermore, even if our technological growth were to cease we would still continue to ascertain more about our environment, as we have not been studying the environment and our impact on it for much time at all (vis-à-vis the amount of time in the Anthropocene, which is arguably at least a few thousand years). Thus, I feel that much of our current limitations in understanding can be attributed to our short temporal relationship with discovering the many intricacies of our environment, as well as the tools (technology) with which we do so, both of which will improve with time. [[User:Alexanderlevitz|Alexanderlevitz]] ([[User talk:Alexanderlevitz|talk]]) 22:07, 15 July 2015 (EDT)
 +
 
 +
 
 +
::*Yes - your points are very apposite.  The Earth's environment is far too complex for us to be able to properly understand, and it may be true that we can never predict what it will do with perfect accuracy, and right now we can't even be sure whether it will rain in Potsdam tomorrow!  [[User:Walkerma|Martin A. Walker]] ([[User talk:Walkerma|talk]]) 23:38, 16 July 2015 (EDT)
 +
 
 +
 
 +
::*Science is most definitely needed in studying the environment but we need to look into ways to stop or slow down the amount of harm we are still causing. With science we need to find more effective ways of cleaning up the garbage we have already polluted our environment with, not only studying the effects it already has created. Another limitation of science is that the harm we are doing to our environment is not only on a scientific level, but on a social level as well. Meaning we have to study the social aspect of how we are globally interacting with the environment in order to better understand ways to fix it. [[User:Ruizja196|Ruizja196]] ([[User talk:Ruizja196|talk]]) 23:11, 15 July 2015 (EDT)
 +
 
 +
 
 +
::*I believe as scientists, or well educated people with a science background, we should take on a greater responsibility in educating others about reusable resources, recycling, and the consequences of our actions. If we do not educate others on the effects of our actions on the plant, who will?  It is also our responsibility as a developed, first world nation to educate other countries and other people of less developed societies to educate them about the resources and proper ways of storage and disposal.  I believe there should be a greater discussion about all of these issues and a movement needs to be created in order for progress to occur. [[User:LeannaCollard|LeannaCollard]] ([[User talk:LeannaCollard|talk]]) 09:19, 16 July 2015 (EDT)
 +
 
 +
 
 +
::*It's true that a limitation of science is that it has no intrinsic morality; the same technology used to help people's hearts and to mine rock in a quarry (nitroglycerin) is the same as that used in weapons of war. If we look to science & technology alone to solve our problems, we will always come up short; it needs to be coupled with the social attitudes and ethics to use the science wisely. [[User:Walkerma|Martin A. Walker]] ([[User talk:Walkerma|talk]]) 23:12, 17 July 2015 (EDT)
 +
 
 +
 
 +
*Science is the practice of conducting experiments in order to falsify theories, in doing so it allows us to form hypotheses and prove them right or wrong by using the scientific method. The limitations of science are that data are easy to manipulate and if not properly understood wrongful claims can be extrapolated. Many people are afraid of science and do not properly understand how it can help us advance our technology and our overall well-being. For instance I learnt in a research methods class that many people will claim that correlational data is causal however this is false. We learnt that there was a correlation between butter consumption and the divorce rates in Maine, but this obviously does not mean that eating more butter will cause you to get divorced. There are many third variables that need to be controlled or held constant in order to increase the validity or reliability of a study. If the data can be reproduced than theories are  believed to be more true based on the scientific method however increases in technology may help gather more accurate results. This may be a problem when studying the environment because some data from the past was not collected, but researchers have been working hard to take proper measurements for better use in the future. [[User:Rodrigaf197|Rodrigaf197]] ([[User talk:Rodrigaf197|talk]]) 23:53, 15 July 2015 (EDT)
 +
 
 +
 
 +
::*Yes, developing hypotheses and theories is central to doing science, and as Grant mentioned above, collecting data is also a key part.  Most scientists seem willing to try hard to be objective, but with a subject of high complexity like the environment the causality may often be hard to make.  There may be multiple causes for one effect.  Are neonicotinoids causing the collapse of bee populations, or are there other causes such as loss of habitat, etc., or is it a combination of causes? A company manufacturing neonicotinoids may well try to "spin" the science to show evidence that their products are "innocent"; meanwhile, an environmental group may distort the science in order to provide someone to blame.  The hypothesis is unable to develop in such an atmosphere of partisanship. [[User:Walkerma|Martin A. Walker]] ([[User talk:Walkerma|talk]]) 23:12, 17 July 2015 (EDT)
 +
 
 +
 
 +
* The limitations of science when it comes to the environment are rooted in the limitations of the technology at a given time. For example, our ability to forecast weather has improved and evolved greatly over the past 20 years due to the use of satellites, electronic buoys in the oceans, dopplers, and computer models.  As these technologies improve, the limitations may decrease but it will take time for the technology to evolve into what we need to use it for.  Knowledge that is gained from the technology that we use will help us in developing further technologies that can harness the resources we may need to support a sustainable environment.  For example, the use of pesticides by agricultural companies that have developed chemicals to increase crop production, have over time proven to have negative effects on the environment.  As a consequence, in recent times, there has been more research done to create a more organic, environment-friendly chemical to do the same job without the negative side effects. [[User:Visserjr199|Visserjr199]] ([[User talk:Visserjr199|talk]]) 16:55, 16 July 2015 (EDT)
 +
 
  
*Science is an ever expanding and changing field and although this has countless benefits it also produces some limitations. The processes that science helps create to benefit the environment can become very costly. This is because scientists are working on such new techniques and processes that there is no common production of these items. The materials necessary may be costly to make, and the processes may be very time consuming or difficult to learn. Although there is a lot of potential for these newer options it is going to take a lot of initial time and money to implement any changes that would help the environment. Also, scientists do not have the power to make any changes in global processes. Even if they create a novel way of using energy and decreasing pollution, there are many political hoops to jump through to make any sort of changes to use their new techniques. ([[User:Magenta|Magenta]] ([[User talk:Magenta|talk]]) 13:53, 17 July 2013 (EDT))
+
::*And the process continues on!  Probably some of the pesticides we consider harmful today were seen as a great improvement on what we had before. You'll like the green chemistry unit later in the course; in green chemistry, the environmental impact is built into the product & process development process, so you don't produce a pesticide (say) until you know it's as safe as it can possibly be for the environment. [[User:Walkerma|Martin A. Walker]] ([[User talk:Walkerma|talk]]) 23:12, 17 July 2015 (EDT)
  
 
==Wonder tech==
 
==Wonder tech==
Line 32: Line 113:
  
  
*One of the biggest issues facing our species today, aside from a marked decrease in the availability and useability of resources like water (my particular passion), is an ever increasing need for a source of relatively clean, efficient and affordable energy. In that our main source of energy is now petroleum (in China it is shockingly still coal), and which according to geologist M. King Hubbert (Hubbert Curve/Peak Oil), as well as others, is quickly approaching the point where we will simply run out of this incredibly efficient but non-renewable resource, we need to begin investing in other, if not renewable, then at least more plentiful and sustainable energy resources. "There are an estimated 1.3 trillion barrels of proven oil reserve left in the world’s major fields, which at present rates of consumption will be sufficient to last 40 years. By 2040, production levels may be down to 15 million barrels per day – around 20% of what we currently consume" (http://www.imeche.org/knowledge/themes/energy/energy-supply/fossil-energy/when-will-oil-run-out). Therefore, if I had 50 billion dollars I would use that money to invest in research geared toward the development of nuclear fusion technology. Nuclear fusion is a process by which we would be able to utilize a particular isotope known as Helium-3, or He-3, which while scarce and expensive here on planet Earth is plentiful on the surface of the moon. "Helium-3 is a light, non-radioactive isotope of helium with two protons and one neutron [which is] embedded in the upper layer of regolith by the solar wind over billions of years"(http://en.wikipedia.org/wiki/Helium-3). Not only is nuclear fusion "a more sustainable way to generate nuclear energy, utilizing He-3 it produces less radioactive waste" (http://www.wired.com/science/space/news/2006/12/72276?currentPage=all) than either plutonium or radium. In fact, some estimates claim that there is enough He-3 on the moon to generate power for more than a thousand years. This technology however, in that it is generally seen as 'pie in the sky', and/or as currently irrelevant, is still at the very least fifty years away, and likely would cost far more than 50 billion dollars to actualize.[[User:Haw7thorne|Haw7thorne]] ([[User talk:Haw7thorne|talk]]) 23:49, 16 July 2013 (EDT)
+
*If I have $50 billion to spend on developing some new technology, I would allocate the money in many different areas.  Of course I would spend a great deal of this money on research.  This research would be new technologies and advancements that kept people living longer lives.  Although this proposes the issue of people living longer and depleting more resources on this Earth, I would still choose to allocate my money to healthcare and technological advancements in this sector of science. This could be in heart transplants and better working devices of the heart, such as advancements to pacemakers and other cardiovascular technologies.  I would also allocate some of this money to neurological technological devices to improve the lives of those who have brain abnormalities and neurological disorders. Overall, I would want to invest my money that will improve the quality of life to those with health care issues.[[User:LeannaCollard|LeannaCollard]] ([[User talk:LeannaCollard|talk]]) 20:22, 13 July 2015 (EDT)
 +
 
 +
 
 +
*If I had a $50 billion budget to develop a new technology I would attempt to create a new range of energy-producing construction materials that will be utilized for the façades of all types of buildings. For example, I would try to create both synthetic wood (in order to avoid deforestation) and bricks that have a photovoltaic laminate (similar to the new fully transparent solar concentrator, i.e. solar panel window). This laminate would preserve the aesthetic appeal of either option (brick or faux wood), and would allow the entire exterior of the house to generate energy (as opposed to being limited to rooftops). If I still had money leftover (after what is hopefully a success) I would attempt to make wind energy more accessible to homeowners, especially those in cities, as well as utilizing space that is normally unused. For example, in Brooklyn there are numerous brownstones and buildings that have multiple chimneys that are no longer in use, thus I would figure out a way to house the stem of the wind turbine in the chimney, thereby saving space on the roof (for solar panels or a green roof), and potentially making the wiring of the system to the house less complicated. [[User:Alexanderlevitz|Alexanderlevitz]] ([[User talk:Alexanderlevitz|talk]]) 18:08, 15 July 2015 (EDT)
 +
 
 +
 
 +
*If i had $50 billion to help develop a new technology I would definitely choose solar energy and wave energy, theses two are actually my personal favorites (with geothermal in close 3rd). I would use this money to develop solar panels that can use more of the suns energy, and use it more efficiently. there is so much energy that is generated form the sun if were were able to finally develop a solar panel that can capture say 40%o of the energy that hits it and use it for electricity. With wave energy I would also like to invest money into developing it and making this form of energy one that is actually well known since not many people know about it. Finally I would also spent the money on creating wave energy farms in the seas and use this power to help supply power to the places that need it. [[User:Rileytc197|Rileytc197]] ([[User talk:Rileytc197|talk]]) 20:19, 15 July 2015 (EDT)
 +
 
 +
 
 +
::*I have always been a fan of wave energy too, it is unfortunate that we haven't done more to harness the immense energy of the oceans. However, I do realize that it is quite difficult to produce wave turbines that can withstand the corrosive nature of saltwater, as well as ensuring there is no ecological impact. I also agree that photovoltaic cells need much improvement, but I am hopeful that graphene will bolster solar cells (as well as other methods, such as utilizing genetically modified bacteriophages). [[User:Alexanderlevitz|Alexanderlevitz]] ([[User talk:Alexanderlevitz|talk]]) 19:14, 17 July 2015 (EDT)
 +
 
 +
 
 +
*I would spend the money into research regarding the efficiency of existing renewable energy technologies. For example, while solar panels are getting better, they are still not capable of converting nearly as much of the light that hits them into electrical energy as we would like. The more efficient they become, the more power you can get per square foot of panel, the cheaper it becomes to produce energy this way, and the cheaper it becomes the more realistic it becomes as an alternative for all fossil fuel use.[[User:Gallaggc196|Gallaggc196]] ([[User talk:Gallaggc196|talk]]) 21:51, 15 July 2015 (EDT)
 +
 
 +
 
 +
*If a $50 billion investment opportunity presented itself I would split it evenly into two pollution preventative operations. The first would be Solar Roadways, as I believe their are the future of American roadways and parking lots. These new prototypes of solar roadway panels can be installed and if need be single panels can be replaced for simple maintenance. LED lights and heaters are installed to keep snow off the panels so lights are visible, this would prevent many car accidents and makes blocking off a road easier via the LED warning signals on the panels. They power themselves and collect a lot of energy generated from the sun which could help power car recharge stations on roadways to help promote the use of electric cars, and the extra power could be used in houses or buildings. The second would be in The Ocean Cleanup which has been developing floating barriers that are cost-effective and are engineered so the plastic filters itself through the barriers due to the ocean current, and it allows all animals including large whales to small plankton to safely pass under and through the barriers. This project could clean up the half the Great Pacific Garbage Patch in 10 years’ time and this has been demonstrated in recent models. Both of these projects would create thousands of jobs and would be a step in the right direction that would help clean up the planet, and they are both simple ventures that many Americans would be in agreement with. [[User:Rodrigaf197|Rodrigaf197]] ([[User talk:Rodrigaf197|talk]]) 22:37, 15 July 2015 (EDT)
 +
 
 +
 
 +
::*I absolutely love the idea of solar roadways, as it is providing essential infrastructural components with an added (environmentally beneficial) purpose. Have you seen the solar bike path that was implemented in the Dutch city of Krommenie? It is both incredibly laudable and remarkable (it does need more improvements in terms of durability and efficiency, but that is to be expected as it is still essentially a trial run). To take the solar roads further it would be awesome to couple the solar cell roadways with technology that would allow us to also capture the frictional and kinetic energy of the cars that utilize the roadways, thereby maximizing energy production (this has been done only with kinetic energy, if you are interested look up TheMotionPower™ system by New Energy Technology, Inc.).   [[User:Alexanderlevitz|Alexanderlevitz]] ([[User talk:Alexanderlevitz|talk]]) 19:33, 17 July 2015 (EDT)
 +
 
 +
 
 +
::*I think Solar Roadways is a great idea, and I hope the estimate is right that in the US we could generate enough power with them to replace all other other sources three times over. I'm actually planning on doing my essay on them.[[User:Gallaggc196|Gallaggc196]] ([[User talk:Gallaggc196|talk]]) 23:44, 17 July 2015 (EDT)
 +
 
 +
 
 +
::*I have always thought that solar roads and railways would be a great idea, there are so many pros to having them as a part of our society. Using solar energy to keep the roads lit and snow free would cause roads to be so much safer than they are now. Also i think that what we have done to the ocean is a shame something must be done like you have said. There are countless numbers of aquatic species that have been damaged and or killed off by the garbage that is in our oceans.[[User:Rileytc197|Rileytc197]] ([[User talk:Rileytc197|talk]]) 00:11, 18 July 2015 (EDT)
 +
 
 +
 
 +
*I would use most of the money on researching ways to get appropriate technology to people in third world countries so they can get access to get clean water and cleaner fuels/energy to cook with. I would spend the rest of the money on making this a reality. I believe this would allow them to live healthier lives, and would help to decrease the amount of harmful emissions in the environment. I also believe that in addition to getting appropriate technologies into their communities we also need to educate them on ways to sustain the equipment that we are leaving them with. This, I believe, would eventually help to get them out of their financial instabilities as well; but that would be a long term goal for this project. [[User:Ruizja196|Ruizja196]] ([[User talk:Ruizja196|talk]]) 23:12, 15 July 2015 (EDT)
 +
 
 +
 
 +
::*I really like this idea for two reasons. One, it is so important to help clean up the water in the world so that it can be useful for multiple purposes. Two, this technology would directly help people of underdeveloped countries. I am a huge advocate for helping people in second and third would countries, so this really hits home for me.  It is so important to help other humans as we are all on this planet together. Lets help each other and strive for a better world. [[User:LeannaCollard|LeannaCollard]] ([[User talk:LeannaCollard|talk]]) 09:23, 16 July 2015 (EDT)
 +
 
 +
 
 +
* If I had $50 Billion, I would invest money in reducing our use of fossil fuels by designing and constructing transportation that would run on renewable resources, which will reduce our Carbon footprint.  I would hire a team to research further and design a better model of a car that would harness hydrogen fuel cells.  I would also want the team to make it economical for the average consumer. [[User:Visserjr199|Visserjr199]] ([[User talk:Visserjr199|talk]]) 17:06, 16 July 2015 (EDT)
 +
 
 +
 
 +
::*could you name some specific ways that you could construct efficient transportation? Would it be underground rails or bus transportation? [[User:Rodrigaf197|Rodrigaf197]] ([[User talk:Rodrigaf197|talk]]) 16:44, 17 July 2015 (EDT)

Latest revision as of 11:24, 19 July 2015

THE SUSTAINABLE
WORLD
(Chemistry 321)
Earth from space
MAIN PAGE
SyllabusSchedule
Welcome page
Contact Dr. Walker
This week
Today's tasks(tomorrow)
Course units
1 - 2 - 3 - 4 - 5 - 6 - 7
8 - 9 - 10 - 11 - 12 - 13 - 14
Moodle site

Course content
Assignments

Paper - Acme - 1 - 2 - 3 - 4 - 5
Final exam - Practice final

Practice problems
Discussions

General wiki help
Basic editing
Create an account
Protocols
Tutorial
Demo, for practice

This discussion is based on discussing three questions, and it is set to take place on the wiki, over the next few days. You have until midnight on Wednesday, 15th July to post your initial direct answer to each of the questions. Then, by Friday, 17th July, you should post at least two comments in response to (and under) the comments by other students. Be sure to start your text with a *, and sign your responses with four tilde marks at the end.

Laws of conservation of matter and energy

Classical laws of chemistry and thermodynamics tell us that neither mass and energy cannot be destroyed; both are conserved during any physical or chemical process. (Strictly speaking we should use a combination of mass-energy when talking about nuclear reactions, but these are rare on Earth.)

What can we learn from the conservation of mass and conservation of energy when considering global resources of mass and energy?


  • From the Law of Conservation of mass and energy, we must consider several things when discussing global resources. In order to conserve mass and energy on a global scale, we must implement and use renewable resources that we have on hand. For example, we have seen that wind mills and wind turbines are a great source for creating energy at low cost. It may be costly to make a wind turbine and implement this into a certain location, but it will undoubtedly save money in the long term. Additionally, we must not use more energy than we have have and what we can make. We are expending our resources at a rapid rate, and it is necessary to scale back on a global scale, in order for our resources, land, and capital to last decades and centuries into the future.LeannaCollard (talk) 20:17, 13 July 2015 (EDT)


  • Yes, we're expending resources of stored solar energy, and once they're gone it will take millions of years to replace; the wind power is taking the energy at the time it's generated from the sun, without depleting any stored energy.Martin A. Walker (talk) 13:49, 16 July 2015 (EDT)


  • how do you think we could cut back on a global scale? Would this change occur at a fast rate or do you think our current efforts are suitable enough? Rodrigaf197 (talk) 16:46, 17 July 2015 (EDT)


  • Although energy and matter can neither be created nor destroyed, it is imperative that we rationally and respectfully manage global energy and material resources. This is due to the fact that there are many irreversible reactions, such as the combustion of gasoline in an automobile. The combustion of the chemical energy from the hydrocarbon is converted into mechanical energy (moving the car), and consequently produces water and carbon dioxide (as the mass of the reactants must equal that of the products). However, going from the products (CO2 and H2O) back to the reactants (hydrocarbon and oxygen) is not feasible. Thus, this example highlights the dire need to appropriately conserve global resources, and to adequately focus on the effectuation and development of more renewable and sustainable technologies (and behaviors conducive to the success of future generations). Alexanderlevitz (talk) 17:03, 15 July 2015 (EDT)


  • You're right - it is in effect irreversible. Human beings aren't so easily "trained", though! Certainly we need to educate people and foster the good choices, but we need also to ensure that society as a whole doesn't keep using fossil fuels; that could involve a combination of regulation, incentives and technology, as well as international agreement.Martin A. Walker (talk) 13:49, 16 July 2015 (EDT)


  • If we look at the conservation of mass and conservation of energy we can learn a few things when considering global resources of mass and energy. Due to the conservation of energy and mass we know that these things are limited and cannot created more.therefore we must actively conserve the resources that we have present on earth, because even though these things cannot be destroyed sometimes they cannot be changed back into something that we see as useful to us either. once this happens we are such with the waste that we do not want, and less of the product that we had started with. This also shows us that we need to use processes that have a high efficiency and high yield when considering how to create or make different products. Finally we can also learn that there is only so much energy available, and finding the greenest most effective way to harness this energy will make it so that we make less impact on our environment and that the world will still be around for future generations.Rileytc197 (talk) 17:51, 15 July 2015 (EDT)


  • Yes - it's a good idea to try and use what we have more efficiently! I always recall my chem professor saying (in 1980 or so, when I had a whole eight-lecture class on petroleum chemistry) that it was such a waste just to burn petroleum, when it's such a wonderful source of useful chemicals!Martin A. Walker (talk) 13:49, 16 July 2015 (EDT)


  • Conservation of mass and conservation of energy are not serious issues for our planet. In order for conservation of mass to be an issue, more mass would have to escape the atmosphere, such as spacecraft,than enters the atmosphere, such as colliding comets and meteorites. For Conservation of energy to be an issue, we would have to be radiating more energy out into space than we are taking in from it, predominantly from the sun. What we do have to worry about, is the makeup of that mass. The elements that mass is made up of, the molecules those elements are organized into, and their arraggement in the core, crust, and atmosphere of the planet.Gallaggc196 (talk) 20:23, 15 July 2015 (EDT)


  • A good point to raise! You're absolutely right about conservation of total mass, and that it's what elements make up that mass that is important. We're not running out of mass, but we might conceivably run out of affordable sources of (say) platinum or niobium. (The law does in fact imply that for chemical processes; you can't process 1 tonne of niobium from rocks and get 2 tonnes of niobium out of it!) However, on energy I think you're avoiding a key point; we as a species use up a lot of energy - way beyond what we get just from food - to stay warm/cool, for transportation, industry, agriculture, etc. What matters here is the exergy (see Hill). Energy can do work when it's in petroleum, or solar radiation (if we have solar panels), but once we burn our gasoline it becomes low grade heat which can no longer be used - it just warms the planet a little. The Second Law of Thermodynamics gets in the way! To be sustainable, we ultimately are limited to the amount of energy we can harness from the Sun/Moon and from the heat inside the Earth, or from nuclear power, with the Sun being the major source. See Rodrigaf197's post below - she puts it beautifully! Martin A. Walker (talk) 13:49, 16 July 2015 (EDT)


  • Yeah, I thought that might not be the real point of the question, but while we do use up a great deal of exergy, we don't really "use up" energy, and I figured I should answer the question as written in case you were trying to make sure we had been doing the reading and understood that matter and energy cannot be created or destroyed (I understand that it is possible to convert mass into energy and perhaps the other way but you know what I mean).Gallaggc196 (talk) 23:45, 17 July 2015 (EDT)


  • Knowing that mass and energy can neither be created nor destroyed, we should learn to do the same with our resources. We should make sure that our resources are being reused and remade into different things instead of just trashing them and letting them slowly rot away and harm the environment. We need to become well informed about how to reuse and repurpose what we think is garbage. If people only knew how long it took for some our garbage to degrade, I believe we wouldn’t throw so much of it in the trash. Ruizja196 (talk) 23:10, 15 July 2015 (EDT)


  • Nice idea to focus on reuse/repurpose (and recycling, too, I'd say). - although the Earth does have huge amounts of mass in general, the materials we use are often very specific, and they contain large amounts of exergy. Reuse, etc. ensures frugal use of the natural capital we have in both matter and energy.Martin A. Walker (talk) 13:49, 16 July 2015 (EDT)


  • I agree with this statement that it is very important that as humans we are consciously aware of our decisions in regards to our resources and being responsibile with them. I believe that as habitants of Earth, we should be responsibility recycling every opportunity that we have. Additionally, there are many materials that we can reuse that such as plastic, certain metals, paper, and many more. I think it is also important that we educate members of society about how long it takes materials to break down. Some materials may not even break down in our lifetime so it is important that people know the significance of their actions and the consequences that arise. LeannaCollard (talk) 09:17, 16 July 2015 (EDT)


  • I think that this is very true we need to definitely look into making sure everyone is informed about reusing our resources, we only get one planet and it only has so much of a given resource on it. we need to be conscious about that, and learn to be not wasteful with our resources.Rileytc197 (talk) 00:11, 18 July 2015 (EDT)


  • When looking at the laws of thermodynamics it is important to understand how they apply to our planet and they help explain how life is able to sustain itself. The first law tells us that energy is conserved therefore the amount in the universe is constant, so this means it can only transform from one form to another. This helps us understand that energy cannot be consumed, rather it is quantized and distributed into different microstates which can be seen as vibrational, rotational, and translational motion within molecules. This brings us to the second law which states that spontaneous processes happen in one direction and are accompanied by an increase in entropy, which can be seen as energy being distributed in more ways and thus occupying many more smaller quantum states. This applies to our planet in that we are open systems which allows for the movement of energy and matter thus counteracting the spontaneity and entropy increase. We must use our resources in a way that will contain stored energy and prevent decay since they are not in equilibrium. In doing so we decreased the entropy of the object but increase the entropy in the environment. These laws can help us understand how to develop sustainable systems that minimize the harm on the environment. Rodrigaf197 (talk) 23:43, 15 July 2015 (EDT)


  • Although this answer focuses more generally on the thermodynamics (esp. the 2nd law) rather than just the conservation of mass-energy, this is an extremely perceptive and insightful post! You are dead on. Maybe next year I'll ask more about the second law? Well done! Martin A. Walker (talk) 13:49, 16 July 2015 (EDT)


  • The Law of conservation of matter and energy, states that the total amount of energy in the universe is constant, which means that all of the energy has to end up somewhere, either in the original form or in a different form. We can use this knowledge to determine the energy efficiency of the system. Many environmental problems are associated with burning fossil fuels for energy. The combustion reaction of a fossil fuel with oxygen releases water, carbon dioxide, and any impurities contained in the resource into the environment. Humans have used most of the fossil fuel reserves over the past 200 years. While we are still using up fossil fuels we have also started to look towards many types of renewable resources. Humans have learned to take advantage these different forms of renewable resources, including: solar power, hydropower, wind power, and geothermal energy. Visserjr199 (talk) 16:10, 16 July 2015 (EDT)

Limitations

Science is clearly valuable when studying the environment. What do you perceive as the limitations of science in this context?


  • Science is what we believe to be true here and now. We have learned over decades and centuries that was once believed as true, certainly may not be. The limitation to science in this context is that what we believe to be accurate and true today, may not be accurate and true fifty years from now. There will be great advancements in technology that may enhance our belief or prove it to be false all together. It is naive of us to say that what we believe is 100% true and always will be. The great thing about science is that it is a process and it is always evolving. LeannaCollard (talk) 20:17, 13 July 2015 (EDT)


  • I think science is more than just a belief, which makes it sound like anyone can believe what they like. You can't design technology - say a cellphone - if you don't accept the current theories; if you apply hundreds of pieces of our current scientific knowledge together, the cellphone works, and is an amazing piece of technology. It is certainly true, though, that many of our current theories will need to be revised as time goes on. That can be a strength - the comparative openness of scientists to accept change, based on experiments and data. It is also true that often scientists don't know things as facts - e.g., what color Tyrannosaurus skin was - but they often speculate based on limited knowledge and their hypotheses (which are important) are then presented as "fact" in books. I find it hard to accept, though, that we will decide in the future that water is no longer one oxygen bonded to two hydrogens!Martin A. Walker (talk) 23:38, 16 July 2015 (EDT)


  • When it comes to science and the environment there are a few limitations that are present. The main limitation that is present is the fact that science is based on what is know at the time, if the information is incorrect or not fully there than we cannot base a correct assumption on that science. Also the fact that nowadays with the internet and all of the media that we have false science or science that has been changed to make look a certain way is also a big thing. this means that some people who are honest will see the correlation in the data about the environment, while those being paid to say otherwise falsify data or change it to support what they want. Rileytc197 (talk) 19:46, 15 July 2015 (EDT)


  • Science does operate in society, and society can have powerful factions that may not like some conclusions that scientists come to - for example, the church had a hard time accepting that the Earth went round the Sun. So this type of misinformation is nothing new, though the postmodernist viewpoint we often hear today likes to say that "my view of the science is as equally valid as yours." It is not, if you're claiming that the formula for water is HO (as Dalton believed) rather than H2O. Ultimately, science is based on reason, logic, experimental data and prediction, and as long as the scientific community builds on that it remains strong. However, there are many areas - such as climate and biology, two areas experiencing controversy - where it is almost impossible to conclusively prove that climate change is man-made, say; even though there is very strong evidence to suggest it is, there is a real (but I would say very small) possibility that climate change has another cause, or is perhaps not even happening at all. What a scientist should do in such circumstances is use the most reasonable hypothesis and work with that - but of cause the devil lies in that word "reasonable"! It should mean that the weight of experimental data support it, but all of us can have beliefs that can make us evaluate the evidence differently.Martin A. Walker (talk) 23:38, 16 July 2015 (EDT)


  • The limitations of science in this context revolve around human knowledge and the limits of the physical world. Many of our problems can be overcome by technology. Human life was improved drastically by the industrial revolution and many of the things that have come from it and come after it. Factories and the machines inside them grew economies by creating more products at higher quality and consistency while also doing it more quickly and with greater frequency. Information technologies allowed for more rapid and reliable transmission of data and information, connecting the now wealthy world like it never had been before. Now as we have seen the effects our progress is having on our home we have turned our attention to saving it. Green technologies have emerged in the form of solar power, wind power, geothermal power, and to an extent, nuclear power. With greater application of these technologies and more research to improve their efficiency, we can significantly reduce the negative impact we have on the planet. However, everything comes back to the science and science is dependent on one thing, data. We need testable, comprehensible, data. The amount of data we have and and the amount of that we can use is dependent on how much relevant data exists ultimately, but more realistically it is dependent on our ability to gather and analyze it. As this improves, technology will improve with it, and devices such as solar panels and wind turbines will improve as well. The other limit, the physical world, is composed of things such as the amount of energy emited by the sun, the ammount of space on the earth that can be covered in solar panels, the speed of the wind, and the total number of turbines that can be placed on the planets surface. While human knowledge can be improved, the limits of the physical world cannot, so while human knowledge is a "soft limit" on science, the limits of the physical world are a "hard limit".Gallaggc196 (talk) 21:37, 15 July 2015 (EDT)


  • A very interesting post, and your closing sentence is beautifully written! Well done! One thing the information revolution & internet have allowed us to do is to (a) handle orders of magnitude more data at a time, and (b) share those data across the world, so we can put things together in new ways. We've barely begun to reap the benefits of that in our science. Of course, science and technology can both be used for harmful purposes as well; the industrial revolution also produced the carnage of modern wars, and WW1 in particular IMHO. We need to make sure the technology serves us well. Thanks, Martin A. Walker (talk) 23:38, 16 July 2015 (EDT)


  • Understanding the environment through the scientific process does have some inherent limitations. For example, there can be a number of confounding factors that make obtaining data, and a subsequent conclusion difficult or impossible. The complexity and breadth of the environment also complicates our ability to gain a comprehensive understanding of the environment. However, as technology continues to advance so will our capacity to comprehend and discover more about our environment. Furthermore, even if our technological growth were to cease we would still continue to ascertain more about our environment, as we have not been studying the environment and our impact on it for much time at all (vis-à-vis the amount of time in the Anthropocene, which is arguably at least a few thousand years). Thus, I feel that much of our current limitations in understanding can be attributed to our short temporal relationship with discovering the many intricacies of our environment, as well as the tools (technology) with which we do so, both of which will improve with time. Alexanderlevitz (talk) 22:07, 15 July 2015 (EDT)


  • Yes - your points are very apposite. The Earth's environment is far too complex for us to be able to properly understand, and it may be true that we can never predict what it will do with perfect accuracy, and right now we can't even be sure whether it will rain in Potsdam tomorrow! Martin A. Walker (talk) 23:38, 16 July 2015 (EDT)


  • Science is most definitely needed in studying the environment but we need to look into ways to stop or slow down the amount of harm we are still causing. With science we need to find more effective ways of cleaning up the garbage we have already polluted our environment with, not only studying the effects it already has created. Another limitation of science is that the harm we are doing to our environment is not only on a scientific level, but on a social level as well. Meaning we have to study the social aspect of how we are globally interacting with the environment in order to better understand ways to fix it. Ruizja196 (talk) 23:11, 15 July 2015 (EDT)


  • I believe as scientists, or well educated people with a science background, we should take on a greater responsibility in educating others about reusable resources, recycling, and the consequences of our actions. If we do not educate others on the effects of our actions on the plant, who will? It is also our responsibility as a developed, first world nation to educate other countries and other people of less developed societies to educate them about the resources and proper ways of storage and disposal. I believe there should be a greater discussion about all of these issues and a movement needs to be created in order for progress to occur. LeannaCollard (talk) 09:19, 16 July 2015 (EDT)


  • It's true that a limitation of science is that it has no intrinsic morality; the same technology used to help people's hearts and to mine rock in a quarry (nitroglycerin) is the same as that used in weapons of war. If we look to science & technology alone to solve our problems, we will always come up short; it needs to be coupled with the social attitudes and ethics to use the science wisely. Martin A. Walker (talk) 23:12, 17 July 2015 (EDT)


  • Science is the practice of conducting experiments in order to falsify theories, in doing so it allows us to form hypotheses and prove them right or wrong by using the scientific method. The limitations of science are that data are easy to manipulate and if not properly understood wrongful claims can be extrapolated. Many people are afraid of science and do not properly understand how it can help us advance our technology and our overall well-being. For instance I learnt in a research methods class that many people will claim that correlational data is causal however this is false. We learnt that there was a correlation between butter consumption and the divorce rates in Maine, but this obviously does not mean that eating more butter will cause you to get divorced. There are many third variables that need to be controlled or held constant in order to increase the validity or reliability of a study. If the data can be reproduced than theories are believed to be more true based on the scientific method however increases in technology may help gather more accurate results. This may be a problem when studying the environment because some data from the past was not collected, but researchers have been working hard to take proper measurements for better use in the future. Rodrigaf197 (talk) 23:53, 15 July 2015 (EDT)


  • Yes, developing hypotheses and theories is central to doing science, and as Grant mentioned above, collecting data is also a key part. Most scientists seem willing to try hard to be objective, but with a subject of high complexity like the environment the causality may often be hard to make. There may be multiple causes for one effect. Are neonicotinoids causing the collapse of bee populations, or are there other causes such as loss of habitat, etc., or is it a combination of causes? A company manufacturing neonicotinoids may well try to "spin" the science to show evidence that their products are "innocent"; meanwhile, an environmental group may distort the science in order to provide someone to blame. The hypothesis is unable to develop in such an atmosphere of partisanship. Martin A. Walker (talk) 23:12, 17 July 2015 (EDT)


  • The limitations of science when it comes to the environment are rooted in the limitations of the technology at a given time. For example, our ability to forecast weather has improved and evolved greatly over the past 20 years due to the use of satellites, electronic buoys in the oceans, dopplers, and computer models. As these technologies improve, the limitations may decrease but it will take time for the technology to evolve into what we need to use it for. Knowledge that is gained from the technology that we use will help us in developing further technologies that can harness the resources we may need to support a sustainable environment. For example, the use of pesticides by agricultural companies that have developed chemicals to increase crop production, have over time proven to have negative effects on the environment. As a consequence, in recent times, there has been more research done to create a more organic, environment-friendly chemical to do the same job without the negative side effects. Visserjr199 (talk) 16:55, 16 July 2015 (EDT)


  • And the process continues on! Probably some of the pesticides we consider harmful today were seen as a great improvement on what we had before. You'll like the green chemistry unit later in the course; in green chemistry, the environmental impact is built into the product & process development process, so you don't produce a pesticide (say) until you know it's as safe as it can possibly be for the environment. Martin A. Walker (talk) 23:12, 17 July 2015 (EDT)

Wonder tech

If you had $50 billion to spend on developing some new technology, what would you choose, and how would you spend the money?


  • If I have $50 billion to spend on developing some new technology, I would allocate the money in many different areas. Of course I would spend a great deal of this money on research. This research would be new technologies and advancements that kept people living longer lives. Although this proposes the issue of people living longer and depleting more resources on this Earth, I would still choose to allocate my money to healthcare and technological advancements in this sector of science. This could be in heart transplants and better working devices of the heart, such as advancements to pacemakers and other cardiovascular technologies. I would also allocate some of this money to neurological technological devices to improve the lives of those who have brain abnormalities and neurological disorders. Overall, I would want to invest my money that will improve the quality of life to those with health care issues.LeannaCollard (talk) 20:22, 13 July 2015 (EDT)


  • If I had a $50 billion budget to develop a new technology I would attempt to create a new range of energy-producing construction materials that will be utilized for the façades of all types of buildings. For example, I would try to create both synthetic wood (in order to avoid deforestation) and bricks that have a photovoltaic laminate (similar to the new fully transparent solar concentrator, i.e. solar panel window). This laminate would preserve the aesthetic appeal of either option (brick or faux wood), and would allow the entire exterior of the house to generate energy (as opposed to being limited to rooftops). If I still had money leftover (after what is hopefully a success) I would attempt to make wind energy more accessible to homeowners, especially those in cities, as well as utilizing space that is normally unused. For example, in Brooklyn there are numerous brownstones and buildings that have multiple chimneys that are no longer in use, thus I would figure out a way to house the stem of the wind turbine in the chimney, thereby saving space on the roof (for solar panels or a green roof), and potentially making the wiring of the system to the house less complicated. Alexanderlevitz (talk) 18:08, 15 July 2015 (EDT)


  • If i had $50 billion to help develop a new technology I would definitely choose solar energy and wave energy, theses two are actually my personal favorites (with geothermal in close 3rd). I would use this money to develop solar panels that can use more of the suns energy, and use it more efficiently. there is so much energy that is generated form the sun if were were able to finally develop a solar panel that can capture say 40%o of the energy that hits it and use it for electricity. With wave energy I would also like to invest money into developing it and making this form of energy one that is actually well known since not many people know about it. Finally I would also spent the money on creating wave energy farms in the seas and use this power to help supply power to the places that need it. Rileytc197 (talk) 20:19, 15 July 2015 (EDT)


  • I have always been a fan of wave energy too, it is unfortunate that we haven't done more to harness the immense energy of the oceans. However, I do realize that it is quite difficult to produce wave turbines that can withstand the corrosive nature of saltwater, as well as ensuring there is no ecological impact. I also agree that photovoltaic cells need much improvement, but I am hopeful that graphene will bolster solar cells (as well as other methods, such as utilizing genetically modified bacteriophages). Alexanderlevitz (talk) 19:14, 17 July 2015 (EDT)


  • I would spend the money into research regarding the efficiency of existing renewable energy technologies. For example, while solar panels are getting better, they are still not capable of converting nearly as much of the light that hits them into electrical energy as we would like. The more efficient they become, the more power you can get per square foot of panel, the cheaper it becomes to produce energy this way, and the cheaper it becomes the more realistic it becomes as an alternative for all fossil fuel use.Gallaggc196 (talk) 21:51, 15 July 2015 (EDT)


  • If a $50 billion investment opportunity presented itself I would split it evenly into two pollution preventative operations. The first would be Solar Roadways, as I believe their are the future of American roadways and parking lots. These new prototypes of solar roadway panels can be installed and if need be single panels can be replaced for simple maintenance. LED lights and heaters are installed to keep snow off the panels so lights are visible, this would prevent many car accidents and makes blocking off a road easier via the LED warning signals on the panels. They power themselves and collect a lot of energy generated from the sun which could help power car recharge stations on roadways to help promote the use of electric cars, and the extra power could be used in houses or buildings. The second would be in The Ocean Cleanup which has been developing floating barriers that are cost-effective and are engineered so the plastic filters itself through the barriers due to the ocean current, and it allows all animals including large whales to small plankton to safely pass under and through the barriers. This project could clean up the half the Great Pacific Garbage Patch in 10 years’ time and this has been demonstrated in recent models. Both of these projects would create thousands of jobs and would be a step in the right direction that would help clean up the planet, and they are both simple ventures that many Americans would be in agreement with. Rodrigaf197 (talk) 22:37, 15 July 2015 (EDT)


  • I absolutely love the idea of solar roadways, as it is providing essential infrastructural components with an added (environmentally beneficial) purpose. Have you seen the solar bike path that was implemented in the Dutch city of Krommenie? It is both incredibly laudable and remarkable (it does need more improvements in terms of durability and efficiency, but that is to be expected as it is still essentially a trial run). To take the solar roads further it would be awesome to couple the solar cell roadways with technology that would allow us to also capture the frictional and kinetic energy of the cars that utilize the roadways, thereby maximizing energy production (this has been done only with kinetic energy, if you are interested look up TheMotionPower™ system by New Energy Technology, Inc.). Alexanderlevitz (talk) 19:33, 17 July 2015 (EDT)


  • I think Solar Roadways is a great idea, and I hope the estimate is right that in the US we could generate enough power with them to replace all other other sources three times over. I'm actually planning on doing my essay on them.Gallaggc196 (talk) 23:44, 17 July 2015 (EDT)


  • I have always thought that solar roads and railways would be a great idea, there are so many pros to having them as a part of our society. Using solar energy to keep the roads lit and snow free would cause roads to be so much safer than they are now. Also i think that what we have done to the ocean is a shame something must be done like you have said. There are countless numbers of aquatic species that have been damaged and or killed off by the garbage that is in our oceans.Rileytc197 (talk) 00:11, 18 July 2015 (EDT)


  • I would use most of the money on researching ways to get appropriate technology to people in third world countries so they can get access to get clean water and cleaner fuels/energy to cook with. I would spend the rest of the money on making this a reality. I believe this would allow them to live healthier lives, and would help to decrease the amount of harmful emissions in the environment. I also believe that in addition to getting appropriate technologies into their communities we also need to educate them on ways to sustain the equipment that we are leaving them with. This, I believe, would eventually help to get them out of their financial instabilities as well; but that would be a long term goal for this project. Ruizja196 (talk) 23:12, 15 July 2015 (EDT)


  • I really like this idea for two reasons. One, it is so important to help clean up the water in the world so that it can be useful for multiple purposes. Two, this technology would directly help people of underdeveloped countries. I am a huge advocate for helping people in second and third would countries, so this really hits home for me. It is so important to help other humans as we are all on this planet together. Lets help each other and strive for a better world. LeannaCollard (talk) 09:23, 16 July 2015 (EDT)


  • If I had $50 Billion, I would invest money in reducing our use of fossil fuels by designing and constructing transportation that would run on renewable resources, which will reduce our Carbon footprint. I would hire a team to research further and design a better model of a car that would harness hydrogen fuel cells. I would also want the team to make it economical for the average consumer. Visserjr199 (talk) 17:06, 16 July 2015 (EDT)


  • could you name some specific ways that you could construct efficient transportation? Would it be underground rails or bus transportation? Rodrigaf197 (talk) 16:44, 17 July 2015 (EDT)