is a professor of law at the University of California, Hastings College of the Law in San Francisco. Previously he was Solicitor (General Counsel) of the U.S. Department of the Interior; Special Counsel to Chairman George Miller of the Resources Committee, U.S. House of Representatives; professor of law at Arizona State University in Tempe, Arizona; Associate Solicitor of Interior for Energy & Resources; and with the Natural Resources Defense Council (NRDC) in California and the Civil Rights Division of the U.S. Department of Justice in Washington.