William R. Moomaw is the Professor Emeritus of International Environmental Policy at the Fletcher School, Tufts University. Moomaw has worked at the intersection of science and policy, advocating for international sustainable development. His activities have included being a long-time contributor to the Intergovernmental Panel on Climate Change and an author on the seminar paper on proforestation.
Moomaw was director of the climate, energy and pollution program for the World Resources Institute in Washington, D.C Later he joined the faculty of The Fletcher School of Law and Diplomacy, where he was appointed Professor of International Environmental Policy. In 1992 he founded the Center for International Environment and Resource Policy, within the Fletcher School, and remained the director of the center for 22 years, until his retirement in 2013.
Moomaw has been a lead author for several Intergovernmental Panel on Climate Change (IPCC) reports, including being the coordinating lead author of the 2001 chapter on greenhouse gas emissions reduction and a lead author for the 2007 IPCC Fourth Assessment Report Chapter 4: Energy Supply in Mitigation of Climate Change (Working Group III).
Moomaw founded the Tufts Climate Initiative and co-founded the Global Development and Environment Institute, and has served on the boards of The Climate Group, Clean Air-Cool Planet, Earthwatch Institute, Center for Ecological Technologies, Woods Hole Research Center, and the Consensus Building Institute. For many years he was head of faculty of the International Program on Sustainability in The Netherlands. The program focuses on the use of the Mutual Gains Approach to negotiation to come to agreement on sustainable development.