The Positive Externalities of Global Warming
Short of Al Gore's testimony, I haven't ran across compelling scientific evidence detailing the effects or reality of global warming. The proof is suspiciously missing from even university level texts (i.e. my environmental geology book). Global warming is being taught the same way creationism was taught in the deep south fifty years ago - gospel truth.
Here is an article that explains (and contains links to) a survey done at Yale detailing the positive effects of global warming. Notice that the representative from Greenpeace refrains from citing anything scientific, instead opting for fear and emotion... But I guess that science has never formed an integral part of state-sponsered religion.