With sixty per cent of the land in the United States under private ownership, the role of the private sector in the conservation of habitat and species diversity is being recognised as increasingly important. This book examines the 'market' for the conservation of natural areas in the United States, considering the efforts of both profit and non-profit making ventures. It discusses the costs and benefits of protecting natural areas, and uses specific examples of landowners and agencies involved in private sector conservation. The book concludes by discussing the potential for, and limitations of, the private conservation market, and the role of the government in the market. The effectiveness of conservation methods is examined at three levels: constitutional, organisational and operational. The book will therefore appeal to all those interested or involved in conservation, from students to policy makers.