As the supply of fossil fuels dwindles, alternative energy sources such as hydroelectricity may become increasingly important. Through a narrative-driven pro/con format--supported by relevant facts, quotes, anecdotes, and full-color illustrations--this title examines the future of hydropower. Topics include: Can Hydropower Ever Replace Fossil Fuels? Is Hydropower Affordable? How Does Hydropower Impact the Environment? Can the Oceans Provide a Significant Source of Hydroelectric Power?