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Antarctic's ice sheet is melting 6 times faster than in 1979

A new scientific study found Antarctica is melting six times faster than 40 years ago. The rapid increase in ice melt could trigger a cascade of land-ice into the ocean in the coming centuries. Eric Rignot, lead author of the study and a professor of Earth System Science at the University of California, Irvine, joins CBSN's Omar Villafranca with more.
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