Professor Percival served as a law clerk for Judge Shirley M. Hufstedler of the Ninth Circuit and for Supreme Court Justice Byron R. White, and spent six years as an attorney for the Environmental Defense Fund. He has served as a visiting professor at Harvard Law School and Georgetown University Law Center. He is the principal author of the most widely used environmental law casebook. He was a J. William Fulbright Scholar at the China University of Political Science and Law in Beijing in 2008 and has worked with the China Council on International Cooperation for Environment and Development, the National People’s Congress, and the Chinese Ministry of Environmental Protection. He has lectured at more than 20 Chinese universities and in 2009 he represented the U.S. State Department on a lecture tour of China. Professor Percival earned his BA degree from Macalester College and his MA and JD degrees from Stanford University.