In The Greening of Pentagon Brownfields, Kenneth N. Hansen explores how states and localities have increased their institutional capacities to deal with the unanticipated consequences of federal downsizing and pollution at military bases in the 1990s. His rigorous methodology-including analysis of personal interviews, comparative case studies, government documents, base conversion surveys, and data from the Congressional Budget Office-makes this project both a useful model for other research studies and an indispensable contemporary history.