Cooperative behavior is particularly difficult when the stakes are very high. In the context of climate change, increased energy costs have very real impacts o

Cooperative behavior is particularly difficult when the stakes are very high. In the context of climate change, increased energy costs have very real impacts on people day to day, particularly in developing countries. For this reason, it's difficult to imagine those countries would behave cooperatively (even if a figurehead signs a document promising they will). It may be that the better strategy is to have the best grades in the first instance, knowing that noone will get extra credit. That is, build a strong and resilient economy so that you are better prepared to deal with, and adapt to, the inevitable challenges associated with global climate change.