Pierre Bezukhov writes "Emissions from thawing permafrost may contribute more to global warming than deforestation this century, according to commentary in the journal Nature. Arctic warming of 7.5 degrees Celsius (13.5 degrees Fahrenheit) this century may unlock the equivalent of 380 billion tons of carbon dioxide as soils thaw, allowing carbon to escape as CO2 and methane, University of Florida and University of Alaska biologists wrote today in Nature. Two degrees of warming would release a third of that, they said. The Arctic is an important harbinger of climate change because the United Nations calculates it's warming at almost twice the average rate for the planet. The study adds to pressure on United Nations climate treaty negotiators from more than 190 countries attending two weeks of talks in Durban, South Africa that began Nov. 28."
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