An environmental engineer turned ecology writer relates the history of our waterways and her own growing understanding of why our waterways continue to be polluted--and what needs to be done to save this essential natural resourse.Water: A Natural History takes us back to the diaries of the first Western explorers; it moves from the reservoir to the modern toliet, from the grasslands of the Midwest to the Everglades of Florida, throught the guts of a wastewater treatment plant and out to the waterways again. It shows how human-engineered dams, canals and farms replaces nature's beaver...