With countries from around the world set to meet in Copenhagen to try to hammer out a post-2012 climate change agreement, no one would disagree that a U.S. commitment to cut greenhouse gas emissions is essential to such a global pact. this paper argues that, on the U.S. side, there is a need to minimize the potential conflicts with WTO provisions in designing such border carbon adjustment measures. The U.S. also needs to explore with its trading partners cooperative sectoral approaches to advancing low-carbon technologies and/or concerted mitigation efforts in
a given sector at an international level.