This text has two unifying themes: materials balances and environmental ethics. First, the book demonstrates that environmental problems need to be solved using a holistic approach instead of a fragmented, single-pollution or single-medium approach. By using the concepts of materials balances, reactions, and reactors, the authors integrate and unify the presentation of water supply, waste-water treatment, air pollution control, and solid and hazardous waste management. Second, since ethics plays an increasingly important part in the professional lives of engineers, the authors incorporate ethical decision making into the discussions and problems. In many of the problems, students are required not only to solve the technical part, but also to consider the ethical ramifications of solving the technical problems.

About the Authors

P. Arne Vesilind received his undergraduate degree in civil engineering from Lehigh University and his Ph.D. in environmental engineering from the University of North Carolina. He spent a post-doctoral year with the Norwegian Institute for Water Research in Oslo and a year as a research engineer with Bird Machine Company. He joined the faculty at Duke University in 1970 where he served as chair of the Department of Civil and Environmental Engineering. In 1999, he was appointed to the R. L. Rooke Chair of the Historical and Societal Context of Engineering at Bucknell University. He served in this capacity until his retirement in 2006.

Morgan received her B.S. in civil engineering from Southern Illinois Universiy Carbondale. A recipient of a National Science Foundation Fellowship, she earned her Ph.D in environmental engineering from Clemson University. She joined the faculty in the Department of Civil Engineering at Southern Illinois University Edwardsville in 1996. From 199-2007 she served as the Graduate Program Director for the Department. Currently she is a tenured professor and Department Chair. She is a licensed professional engineer in Illinois. Dr. Morgan has been active on the Environmental Technical Committee of the St. Louis Section of the American Society of Civil Engineers and in the St. Clair Chapter of the Illinois Society of Professional Engineers. She has received multiple awards including the National Society of Professional Engineers' Youn Engineering of the Year Award in 2001. She is a member of several honor societies, including Chi Epsilon and Tau Beta Pi, as well as other engineering organizations. She has conducted research in a variety of areas. Currently her focus is on stormwater management, particularly through the use of green roofs.