global warming of just 1.5C 'would pump out a TRILLION tonnes of methane and CO2
Study of Siberian permafrost caves shows global warming of just 1.5C 'would pump out a TRILLION tonnes of methane and CO2 U.N. studies show global temperatures have already risen by 0.7C Huge increase in levels of CO2 could accelerate global warming Infrastructure built on top of permafrost across the world would collapse Governments currently committed to no more than 2C climate change By DAMIEN GAYLE PUBLISHED: 12:26 GMT, 22 February 2013 | UPDATED: 14:59 GMT, 22 February 2013 A temperature rise of just 1.5C is likely to release vast amounts of greenhouse gas into the atmosphere from melting permafrost, new evidence suggests. In Siberia alone, the mighty thaw would liberate more than 1,000 gigatonnes of carbon dioxide and methane, experts warn. The extra levels of greenhouse gas are potentially enough to accelerate global warming. Natural ecosystems and human infrastructure would also be seriously disrupted. Frost cryst...