Work started at the United Nations this week on the next big global enviromental treaty. The treaty would create rules of the road for management of the high seas. This would include provisions to create marine sanctuaries and other mechanisms to preserve sea life and biodiversity. 
On the line to discuss this new treaty (which does not yet have a name) is Elizabeth Wilson of the Pew Charitable Trusts. She explains the problems that this new treaty aspires to solve, how it would fit into already existing treaties, like the Convention on the Law of the Sea, and the process and politics surrounding the crafting of this treaty and its eventual ratification.