Achieving sustainable development requires a more complementary and coherent framework of global economic and environmental governance. Despite this need, little progress has been made in clarifying the relationship between the main elements of this architecture–Multilateral Environmental Agreements (MEAs) and the World Trade Organization (WTO). In clarifying this relationship, the international community will need to address a range of of issues, both legal and practical, if it is to ensure that the policies, rules, and institutions governing trade and the environment contribute to a more effective framework for sustainable development.