"Hey tank - I saw a story on CNN about polar bears and how the U.S. gov't is considering putting them on the endangered species list due to global warming. Polar bears cannot survive w/out sea ice. "
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You have to use some common sense with this global warming thing. Think carefully. 1) How long have polar bears been around? 2) How recent was the last global warming? 3) What is the temperature around the North pole? 4) Even the most extreme global warming models have a rise of a max of about 2-4C over the next 100 years. So even if the most dire predictions are correct, some ice will melt, the habitat of the polar bears will shift, as will the habitats of other species including humans. Expectations remain that life will not die out on a global scale. Finally, why are people willing to believe the long-term predictions of global warming when the weather guys can't even predict with reasonable accuracy more than a few days ahead?