I remain interested in teaching students how to think like economists. That is to weigh the costs and benefits of managing the environment and to understand all the implications of programs and regulations. This main thrust has led to teaching courses on the economics of natural resources and the economics of pollution at the undergraduate, Master’s, and PhD levels. In addition, I have taught a courses on environment valuation that explains how to measure society’s preferences for environmental and generally non-market services such as air pollution, recreation sites, or old growth forests.