Enormous in scope, this book presents in comprehensive and logical form the sum of our national knowledge about renewable energy resources. It deals with these resources in terms of opportunities and dangers, in terms of current availability and possible expansion, in terms of how natural resources relate to human resources and needs, and in terms of their replacement potential for nonrenewable resources such as fossil fuels. It also puts domestic resources and needs into the context of international needs, supplies, and policies, emphasizing the issues facing an interdependent world and the urgent requirements perceived by countries less endowed than the United States. This is a handbook for the concerned citizen as well as for resource managers and policymakers at local, regional, and national levels. The analyses it contains underscore the fact that there are no easy answers: everything is part of an interlocking system, and every decision will affect multiple aspects of our daily lives and indeed our very existence. The authors emphasize the crucial importance of early planning, balanced management, and timely decisions, while suggesting that something more is required-a new ideology and a new educational approach.