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By Orville Schell, Michael Massing $9.95
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VinothChandar (CC BY 2.0)
Two sets of scientists working independently have come to the conclusion that the Arctic will soon be ice free and forested.
Zach Dischner (CC BY 2.0)
The melting of Arctic ice frozen for many thousands or even millions of years is speeding up a potential route for carbon frozen deep below ground level to seep into the atmosphere.
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