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Sea Ice Melting Faster than Expected

Arctic ice builds up in the winter, but when the sun shines on it, some of the ice melts (Photo by Jeremy Harbeck, courtesy of NASA)
A NASA study finds that Arctic ice is melting faster than expected. Mark Brush reports:
Related article about sea ice and spy satellites
Producer: Mark Brush
Release Date: July 20, 2009
Running Time: :50

