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Ice sheets melting at poles faster than before

WASHINGTON — Fueled by global warming, polar ice sheets in Greenland and Antarctica are now melting three times faster than they did in the 1990s, a new scientific study says.

So far, that’s only added about half an inch to rising sea levels, not as bad as some earlier worst case scenarios. But the melting’s quicker pace, especially in Greenland, has ice scientists worried.

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