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Since clouds can be seen from space, that means that they reflect solar radiation. Do other green house gasses also reflect solar radiation? Are the amounts of radiation reflected by green house gasses taken into account when modeling their impact on the environment?
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Water vapour forms clouds but other greenhouse gases don't. Cloud formation reduces the heating effect water vapour would have but doesn't cancel it out. Other greenhouse gases absorb radiation and heat the atmosphere. They don't reflect it. The behaviour of gases can be examined in a laboratory and are well understood and are included in models. The exact results from their effects on the real world are far from completely understood.
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How many tons of CO2 are released by the U.S. use of fossil fuels each year?
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Human activity releases about 7 billion tons of carbon into the air each year. The United States is responsible for about 24% of this, so about 1.68 billion tons, which combines with oxygen to make about 6.17 billion tons of CO2.
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How much carbon is trapped in landfills each year? (People have gone into landfills and found that the old method of packing debris in tightly restricts greatly the ability of decomposers to decompose and therefore release carbon.)
How much carbon is trapped in septic tanks each year?
How much carbon is trapped in sewage treatment plants each year?
How much carbon is trapped in embalmed corpses each year?
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Not all the carbon produced by burning fossil fuels stays in the atmosphere some is absorbed by plants, rocks and oceans. Human activity traps some carbon each year in landfills and so forth, but not a great deal compared to natural processes. Septic tanks and sewage plants generally don't trap carbon indefinitely and less than half the dry weight of a corpse is carbon.
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Is it feasible to become carbon neutral by artificially trapping carbon containing waste? (If not, can trapping carbon be part of the solution?)
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Since most carbon dioxide resulting from human activity is released directly into the air from burning fossil fuels, trapping waste is not enough for humanity to become carbon neutral, but it could be part of the solution. It has been suggested that carbon could be trapped by dumping straw or logs in oceans in locations where it will sink and get covered in sediment. It has also been suggested that iron could be added to the southern ocean to encourage the growth of photoplankton and trap carbon that way. However, both these options appear more expensive than reducing fossil fuel use.
D. None of the above. (please tell me what you think the debate is over)
The scientific debate is over just how much effect human activity is having, not whether it is significant.