“If the Arctic Tundra is really emitting more carbon than it absorbs then we are in some peril.  We simply have to dramatically reduce CO2 and methane production and do this very quickly.  Even if you are a global warming sceptic you cannot take the risk.” {Earth and Leaf Editorial} Arctic tundra is now emitting more carbon than it absorbs     Arctic tundra is now emitting more carbon than it absorbs, US agency says The Arctic tundra is undergoing a dramatic transformation, driven by frequent wildfires that are turning it into a net source of carbon dioxide emissions after millennia of acting as a carbon sink, the US National…