Along with three co-editors, he has just finished the second edition of the textbook, Principles and Applications of Soil Microbiology. He has conducted research in bacterial source tracking since 1998. In addition, Peter runs the University of Georgia�s internationally recognized Environmental Ethics Certificate Program. He has also co-edited books on both agricultural and environmental ethics. He resides in Athens, Georgia, with his wife, Mary Jean, and two children, Benjamin and Ruthanne.