About the Author

Charles N Haas is the LD Betz Pofessor of Environmental Engineering and the Head of the Department of Civil, Architectural and Environmental Engin


eering at Drexel University(http://www.drexel.edu).   He received his BS (Biology) and MS (Environmental Engineering) from the Illinois Institute of Technology(www.iit.e

du) and his PhD (Environmental Engineering) from the University of Illinois at Urbana-Champaign (www.uiuc.edu).

His web page is: www.cnhaas.net



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