Disappointing to see it's even a debate. A quick google of "global warming proof" brings up reputable sources such as Nasa, Nature Journal, Scientific American etc. There really is no debate in the scientific community about the reality of global warming, and that humans are at least 2/3 to blame.
It's frustrating to see internet pillocks loudly disagreeing with established scientific fact. The fact that Sarah Palin is one of your most vocal advocates should tell you something.
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