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Uploaded on Mar 8, 2008
Greenland's ice sheet holds the same volume of water as the Gulf of Mexico. Melting is outpacing snowfall these days. But the rate of change in a warming world is still not clear. Andrew C. Revkin, who has written on climate since 1985, explored the giant island with scientists recently for The New York Times. Read more at http://www.nytimes.com/revkin.