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By Karrie Lynn Pennington, Thomas V. Cech. Karrie Lynn Pennington has studied the interactions of land use, water quality, and quantity for over 30 years. She received her bachelor's degree in biology from the University of North Texas, completed her Master of Science in soils from the University of Idaho where she taught until moving to Tucson, Arizona.
When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.