The global supply of freshwater is finite and current estimates put freshwater availability at less than one-half of one percent of the total water stock. Intensive agriculture practices, rapid industrialization, and expanding population and urbanization are reducing freshwater supplies that are further stressed by climate change, placing enormous pressures on the already fragile environmental landscape. The World Wildlife Federation’s (WWF) Dam Initiative report identifies twenty-one river basins around the world at severe risk of ecological degradation: topping the list is the Yangtze in China, La Plata in South America, Tigris and Euphrates in Turkey, and the Ganges and Brahmaputra in India (WWF 2004). Although dams have proved to be a b...