About 12.5 trillion tons of ice from glaciers in Greenland and Antarctica have melted since 1979, which is enough frozen water to stack ice 5 feet deep across the continental United States, according to a report.
IRVINE, Calif. About 12.5 trillion tons of ice from glaciers in Greenland and Antarctica have melted since 1979, which is enough frozen water to stack ice 5 feet deep across the continental United St… [+4327 chars]
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