Water and energy are inextricably linked as unsound management of either resource can have an impact on the cost, availability, and sustainability of the other. This book explores the "energy for water" component of the water–energy nexus. It offers diverse case studies from around the world including the deserts of Saudi Arabia, rural China, Pakistan’s Indus Basin, arid Greek islands, and urban centers such as Los Angeles. The analyses show that while many regions face unique water scarcity challenges, they are all united by the fact that solutions require mobilizing energy.