Climate Experts Warn Thawing Permafrost Could Cause 2.5 Times the Warming of Deforestation!
By Joe Romm on Dec 1, 2011 for Climate Progress

Back in February, a major study found that thawing permafrost feedback will turn Arctic from carbon sink to source in the 2020s, releasing 100 billion tons of carbon by 2100.  That study, by NOAA and the National Snow and Ice Data Center, conservatively assumed all of the carbon would be released as CO2 and none as the far more potent greenhouse gas, methane (CH4). More…