Green Belts have been a cornerstone of planning policy in England and Scotland for more than 35 years. Perceived as successful in achieving their purposes, which include checking sprawl and safeguarding the countryside, Green Belts continue to attract widespread support. But are they as effective as we assume? What are the possible implications of Green Belt policy for the future? Is this policy the best way forward? This book uses cases studies of 28 local authority areas, detailed analysis of development control data and information on appeals, interviews with a wide range of development and conservation interests, and a review of all major relevant material. It is the most comprehensive study to date and includes detailed recommendations for the future.