This talk will focus on emerging conflicts between different, but overlapping, sectors of global governance - on the one hand, the international economic order as represented by the World Trade Organization, and on the other, the international environmental order, as represented by the extensive network of global environmental regimes. In particular, it focuses on the fears raised by many that the WTO and associated Bretton Woods institutions are likely to undermine efforts by international governmental organizations and other non-state actors to protect the global environment. This fear has been driven in large part by several decisions in recent years by WTO tribunals striking down domestic environmental measures that seek to ensure the effectiveness of multilateral environmental agreements.  Analysis seems to indicate that new coalitions and norms of action are emerging that have fascinating implications for students of environmental politics and sociology, and which will probably shape the future effectiveness of global environmental regimes such as the ones studied here.