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MSNBC - Study: Arctic warming threatens people, wildlifeGlobal warming is heating the Arctic almost twice as fast as the rest of the planet in a thaw that threatens the livelihoods of millions of people and could wipe out polar bears by 2100, according to an eight-nation report released on Monday.

The report, the work of more than 250 scientists and the biggest survey to date of the Arctic climate, found that the accelerating melt could point to wider disruptions from a build-up of human emissions of heat-trapping gases in the earth’s atmosphere.