http://www.guardian.co.uk/environment/2009/mar/10/climate-change-copenhagen
Even modest amounts of global warming could trigger a carbon "time bomb" and release massive amounts of greenhouse gases from frozen Arctic soils, a new study has warned.
Philippe Ciais, a researcher with the Laboratory for Climate Sciences and the Environment in Gif-sur-Yvette, France, told the Copenhagen Climate Congress that billions of tonnes of carbon dioxide and methane could be freed by just a 2C average rise.
