60 minutes. Global warming!

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Summary

Are our worst fears about global warming coming true? A visit to the Arctic uncovers evidence that man is contributing to the warming of the planet with devastating effects -- rising seas, stronger...

Are our worst fears about global warming coming true? A visit to the Arctic uncovers evidence that man is contributing to the warming of the planet with devastating effects -- rising seas, stronger hurricanes, and polar bears headed for extinction. Scott Pelley reports.

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