Yes I read you response, and while I think its well reasoned, there is no reason when it comes to diplomacy; there is only the present. A moral obligation will be used as reasoning for pursuing this or that policy when politicians are recording soundbites, but it is never the actual reason. The actual reason is always economic or militarily strategic (which is really just a proxy for economic anyway). The fact that the West is most responsible for the current state of the climate has no bearing on the future state, insofar as it pertains to policy. All diplomats want is the best deal for their own country. This may not be just, but it is reality. Therefore, we better damn well find a way to work together. We have grown our economy on greenhouse gas emissions, but there is no reason Brazil, India and China can't grow theirs in some sustainable way. In fact, starting from where they are, they could easily be better positioned than us in the next several decades, since they won't have to do as much dismantling.