Arctic permafrost is melting faster than predicted

New Scientist: We may be closer to a major climate tipping point than we knew. Earth's permafrost – frozen soil that covers nearly a quarter of the northern hemisphere and traps vast amounts of carbon – may be melting faster than thought and releasing more potent greenhouse gasses. The United Nations Environment Programme (UNEP) released a report yesterday reviewing the most up-to-date research on Arctic permafrost. It claims temperature projections due in 2014 from the International Panel on Climate Change are......

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