The Wall Street Journal on Friday reported on a U.S. Geological Survey report [PDF] suggesting that economically extractable coal reserves in the United States, typically measured at some 240 years' worth, could be substantially less abundant than previously thought - perhaps only half the estimated reserves.
At the opposite side of the carbon cycle, the United Nations Environment Programme released an interesting report [PDF] on the potential of the world's forests, farmland, and peatland to soak up atmospheric carbon.
Todd Stern, the US climate change envoy, said a deal between the two countries – the world's largest polluters – would boost efforts to secure a crucial accord to avoid dangerous climate change. Those UN talks are just six months away.