The main debate now about climate change is one of the interpretations of science. Usually the future climates are predicted using computer models but some scientists believe that there are too many variables to see the big picture. While some scientists who believe human activity is to blame for global warming are ready to outline specific actions to prevent more damage, skeptics are looking for more evidence to warrant change.
http://www.pbs.org/now/science/climatedebate.html
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