Robert G. Varady is deputy director of the University of Arizonaas Udall Center for Studies in Public Policy, where he is research professor of environmental policy. He also is adjunct professor of hydrology and water resources and of arid lands studies; and director of the French CNRS Joint International Unit (UMI) on Water, Environment and Public Policy. Varady has written on climate and water in the U.S.-Mexico border region, transboundary environmental policy, and global water initiatives.