We could not have completed this book without the assistance and support of many generous friends and colleagues. Most notably, we benefited enormously from the critical technical reviews of specialists and generalists among our past and present colleagues in the U.S. Geological Survey and from many other experts whose work we encountered in researching the book. We are very grateful for the technical reviews of chapters and appendices from Dr. Fred Swanson, U.S. Forest Service, Pacific Northwest Research Station; Dr. Kristiina Vogt, College of Forest Resources, University of Washington; Dr. Colin Campbell of the Association for the Study of Peak Oil & Gas, Oil Depletion Analysis Centre, Stockholm, Sweden; Dr. Warren Hamilton, international expert on earth and planetary sciences, Geophysics Department, Colorado School of Mines; Dr. David Pimentel, ecologist with very broad experience in maintenance of Earth’s life support systems, Department of Entomology, Systematics and Ecology, Cornell University; Dr. Charles Francis, Director of the Center for Sustainable Agriculture Systems, University of Nebraska; Vernon Brechin, indefatigable nuclear weapons production and testing researcher; Dr. William Schlesinger, President, Institute of Ecosystem Studies, Millbrook, New York, with wide experience of desert and forest ecosystem responses to global climate change; Dr. Eric Grosfils, Professor of Geology, Pomona College; Allison Jones, ecological grazing impacts researcher, Wild Utah Project; Dr. Douglas Markle, Professor of Fisheries, Oregon State University; Dr. Michelle Marvier, Assistant Professor of Biology, Santa Clara University; Claire Todd, University of Washington; and Rue Furch, Sonoma County, California, Planning Commissioner.
We also owe very special thanks to Dr. D. D. Trent, former Geology Professor at Citrus Community College, Glendora, California, and our good friend, whose broad geologic experience and very excellent textbook on environmental geology have informed and guided us. In addition, Dr. Trent reviewed nearly every chapter of this book. We have had especially helpful discussions on a wide range of subjects with a number of past and present U.S. Geological Survey researchers,