Bill Hewitt has been an environmental professional and activist for nearly 25 years. He is a writer and editor, as well as the principal of Hewitt Communications. He was the Director of Public Affairs for the New York City regional office of the New York State Department of Environmental Conservation for 11 years. He is the blogger on climate change and sustainability for the Foreign Policy Association. Hewitt has been involved with two Presidential campaigns (Bruce Babbitt and Bill Bradley) and two NYC Mayoral races (David Dinkins and Mark Green), working primarily on environmental issues. He was an activist leader with the Sierra Club in New York working on urban issues and acid rain.

Hewitt teaches graduate classes on climate change and clean tech at New York University’s Center for Global Affairs, advises thesis students, and also teaches in the continuing education program. He has taught on international relations, U.S. environmental politics and policy, and climate change at Pace University. His book, A Newer World – Politics, Money, Technology, and What’s Really Being Done to Solve the Climate Crisis, will be out from the University Press of New England late in 2012. He has written articles and book reviews, as well as op-ed pieces and letters, on sustainability, energy and environmental issues for the American Planning Association, the Foreign Policy Association, Nature Reports Climate Change, Grist, Crain's NY Business, the Sierra Club, Greenpeace and Newsday. Hewitt has an M.S. in international affairs from the New School.