My empirical work examines the attitudinal and motivational underpinnings of pro-environmental behaviors. I work at the interface between theory and application. For example, I have done extensive field research on neighborhood and university recycling, using persuasion, self-regulation, and social pressure concepts. I developed a holistic program for changing behaviors with respect to household hazardous material (insecticides, cleansers, paint and so on), using these ideas. My colleague Barbara Brown and I are conducting research on "transit oriented development," including questions of what kinds of people enjoy living in attractive, high density urban environments, and whether people who use transit walk more and are less likely to gain weight I also consult with local and state officials on strategies for increasing commuters' use of mass transit.