Brent Yarnal is Professor of Geography at Penn State University. His research and teaching interests bridge the physical and social sciences, and integrate climate change, natural hazards, land-use change, water resources, and the use of environmental information in decision making. His research focuses on vulnerability to and adaptation planning for present and future climate change, local and regional greenhouse gas emissions inventories and mitigation planning, and the role of climate information in water resource decision making. He has authored and contributed to numerous books and journa...