The role of trace gases Atmospheric trace gasses Methane Nitrous oxide Certain chlorofluorocarbons (CFCs) Absorb wavelengths of outgoing Earth radiation Taken together, their warming effects may be nearly as great as carbon dioxide
Possible outcomes of altering the climate-system Two types Positive-feedback mechanisms reinforce the initial change Negative-feedback mechanisms produce results that are just the opposite of the initial change and tend to offset it
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