Art and Photo Credits:
Cover photography: photos, 10, 14 and 15 by Tyagan Miller; photos, 5, 8, 13, and 16 by Harold Miller; photo, 9 by Analese Poorman; image 3 (and satellite images, pp. 8-9) courtesy of the Indiana Gap Analysis Program and Anna Radue.

SPEA logo, p. 2, designed by Cynthia Moorhead; photos, pp. 3-5, 7, 13, 14, 17, 19-23, 25-28, 31-33, and 36, by Tyagan Miller; atmospheric chemistry model maps, p. 8, courtesy of Journal of Geophysical Research (Volume 96, pp. 15377-15394, 1991); Cryptosporidiosis image, p. 11, courtesy of Steve J. Upton, Ph.D., Kansas State University, crypto.htm; Lake Monroe watershed management maps, p. 12, courtesy of the Geographic Information Systems Laboratory and Avram Primack; cartoon, p. 18, by Mike Cagle; photo, p. 29, by Joyce Ritchie; figures, p. 37, courtesy of National Institute for Global Environmental Change Midwestern Regional Center and Jeff Ehman; photo, p. 38, courtesy of Transportation Research Center; cartoon, p. 38 by Jim Berry, courtesy of Newspaper Enterprise Assocation.