Mary D. Nichols, J.D., was appointed chair of the California Air Resources Board (CARB) in July 2007, a post she held previously under Gov. Edmund H, Brown Jr. from 1979 to 1983. At CARB, she is responsible for implementing California's landmark greenhouse gas emissions legislation as well as setting air pollution standards for motor vehicles and fuels. After graduating from Cornell University and Yale Law School, Nichols practiced environmental law in Los Angeles, bringing cases on behalf of environmental and public health organizations to enforce state and federal clean air legislation. President Clinton appointed her to head the Office of Air and Radiation at the United States Environmental Protection Agency, where she was responsible for, among many other regulatory breakthroughs, the acid rain trading program and setting the first air quality standard for fine particles. She also served as California's Secretary for Natural Resources from 1999 to 2003. Prior to her return to CARB, Ms. Nichols was professor of law and director of the Institute of the Environment at UCLA.