Paul Robbins is a Professor in the School of Geography and Development at the University of Arizona, Tucson. His current research centers on the relationships between individuals, environmental actors, and the institutions that connect them. Robbins is also the author of Political Ecology: A Critical Introduction (2004) and Lawn People: How Grasses Weeds and Chemicals Make us Who We Are (2007). John Hintz is Assistant Professor of Geography and Geosciences at the Bloomsburg University of Pennsylvania. His current research focuses on land use conflicts, environmental policy, and the US environmental movement. He has most recently published in the journals Capitalism Nature Socialism and Ethics, Place and Environment. Sarah A. Moore is Assistant Professor in the School of Geography and Development at the University of Arizona, Tucson. Her research focuses on urban development politics, urban environmental issues, and environmental justice in the United States and Latin America. Her publications include articles in the Professional Geographer and Society and Natural Resources.