Many people believe that environmental regulation has passed a point of diminishing returns: the quick fixes have been achieved and the main sources of pollution are shifting from large "point sources" to more diffuse sources that are more difficult and expensive to regulate. This book examines the potential of some "new tools" that emphasize education, information, and voluntary measures. It summarizes the effectiveness of these tools, both individually and in combination with regulatory and economic policy instruments, and considers what is needed to make these tools more effective.