Brian C. Black, PhD, is head of the Division of Arts and Humanities and professor in the Departments of History and Environmental Studies at Pennsylvania State University, Altoona College. He was previously co-coordinator of the program in environmental studies at Altoona College and visiting assistant professor at Skidmore College and Gettysburg College. He received his doctorate in American studies at the University of Kansas. His published works include the Greenwood titles Nature and the Environment in Nineteenth-Century American Life; Nature and the Environment in Twentieth-Century American Life; and Alternative Energy and Global Warming in the Greenwood Historical Guides to Controversial Issues in America series.

David M. Hassenzahl, PhD, is dean of the School of Sustainability and the Environment at Chatham University. He was previously associate professor and chair of the Department of Environmental Studies at the University of Nevada, Las Vegas. He is coauthor of Environment, Should We Risk It?, and Visualizing Environmental Science. Hassenzahl holds a doctorate from Princeton University's Woodrow Wilson School.

Jennie C. Stephens, PhD, is associate professor of environmental science and policy at Clark University in Worcester, MA. Stephens' research on climate change mitigation and energy technology innovation has been published in multiple journals including Energy Policy, Environmental Science and Technology, Climatic Change, Global Environmental Change, Environmental Communication, and Technological Forecasting and Social Change. Stephens received her doctorate and master's degree at the California Institute of Technology and her bachelor's degree from Harvard University.

Gary Weisel, PhD, is professor of physics at Penn State Altoona. He holds a doctorate in physics from Duke University and a doctoral degree in history of science from the University of Florida. His published works include numerous articles in physics and history, as well as the reference book Global Warming (with Brian C. Black), published by Greenwood.

Nancy Gift, PhD, is Compton Chair of Sustainability at Berea College, Berea, KY. Her published works include A Weed by Any Other Name: The Virtues of a Messy Lawn, or Learning to Love the Plants We Don't Plant and Good Weed, Bad Weed. Gift holds a doctorate in weed science from Cornell University.