Agence France-Presse: Climate change is speeding up the release of carbon dioxide from frigid peatlands in the sub-Arctic, fuelling a vicious circle of global warming, according to a study to be published recently. An increase of just 1°C over current average temperatures would more than double the CO2 escaping from the peatlands. Northern peatlands contain one-third of the planet’s soil-bound organic carbon, the equivalent of half of all the CO2 in the atmosphere. Peat is an accumulation of …