The most recent issue of Stanford Journal of Law, Science and Policy is a special issue on the topic of geo-engineering. Readers interested in the challenges which climate change gives rise to may find the issue worth a look.
In particular the short contribution by Robert Berg, who assesses whether the UN can be a future leader on climate change, is worth noting. Like so many others, Berg concludes that an emphasis on international law only is not the best way forward:
In the end, the question is: how can the United Nations best help stimulate the requisite national actions required to save the world from catastrophic warming? Searching for the hard power of treaties in the hope that they will be enforceable is one way, and must be pursued; but I would place my bets on a multi-pronged approach to encourage national governments more directly to take the necessary fundamental actions.