We have taken for granted seemingly endless supplies of water flowing from reservoirs wells, and diversion projects; access to water has been key to food security, industrialization, and the growth of cities. In this book from the Worldwatch Institute, Sandra Postel explains that decades of profligacy and mismanagement of the world's water resources have produced signs of shortages and environmental destruction. She writes with authority and clarity of the limits-ecological, economic, and political-of this vital natural resource. She explores the potential for conflict over water between nations, and between urban and rural residents. And she offers a sensible way out of such struggles. Last Oasis makes clear that the technologies and know-how exist to increase the productivity of every liter of water. But citizens must first understand the issues and insist on policies, laws, and institutions that promote the sustainable use of water.