National Geographic: Two days before the UN Climate Summit in New York, three new studies paint the clearest picture yet of rising greenhouse gas emissions and the dwindling opportunity for staving off the worst impacts-and also of at least one way that huge undertaking might be shared fairly among the nations of the world.
"The overall outlook is rather bleak," says Steven J. Davis, a climate scientist at the University of California, Irvine, who co-authored a paper published Sunday in the journal Nature Climate...