John Harte is Professor of Energy and Resources at the University of California, Berkeley, and a Fellow of the American Physical Society. He is author of Patient Earth (with Robert Socolow, 1971), Consider a Spherical Cow (1975) and Toxics A to Z: A Guide to Everyday Pollution Hazards (with Cheryl Holdren, Richard Schneider, and Christine Shirley, California, 1991). Toxics A to Z has been named Outstanding Reference Book of 1993 by the American Library Association.