Thomas E. Graedel is Clifton R. Musser Professor of Industrial Ecology, Professor of Chemical Engineering, Professor of Geology and Geophysics, and Director of the Center for Industrial Ecology at Yale University, New Haven, CT, USA. His academic degrees are B.S., Washington State University; M.A., Kent State University; M.S., Ph.D., University of Michigan. Professor Graedel was elected to the U.S. National Academy of Engineering for “outstanding contributions to the theory and practice of industrial ecology, 2002.” His research is centered on developing and enhancing industrial ecology, the organizing framework for the study of the interactions of the modern technological society with the environment. His textbook, Industrial Ecology, cowritten with B. R. Allenby of AT&T, was the first book in the field, and is now in its second edition. It, and his 2005 textbook Greening the Industrial Facility, are used for courses of the same names. His current interests include studies of the stocks and flows of materials within the industrial ecosystem and the development of analytical tools to assess the environmental characteristics of products, processes, and urban infrastructures.