World Resources Institute: I spent the recent U.N. climate negotiations in Doha trying to reconcile two injustices. The first is captured by Nicholas Sterns brutal arithmetic. This is the simple, unavoidable fact that bold greenhouse gas emissions reductions will be needed from all countries to hold global temperature increase to 2°C above pre-industrial levels, thus preventing climate changes most dangerous impacts. Developing nations, many of which are battling crippling poverty and inequality at home, are being told...