P. H. Liotta is Executive Director of the Pell Center for International Relations and Public Policy in Newport, Rhode Island, and Tenured Professor of Humanities at Salve Regina University. As a member of the Intergovernmental Panel on Climate Change, he shares in the 2007 Nobel Peace Prize. He is the author of seventeen books.
Allan W. Shearer is Assistant Professor of Landscape Architecture at the School of Environmental and Biological Sciences, Rutgers-The State University of New Jersey. His work focuses on the development and use of scenarios for environmental planning and management decisions.