Book excerpt: In 1992, at the United Nations Conference on Environment and Development in Rio de Janeiro, the nations of the world agreed to implement an ambitious plan for ecologically sustainable human development. This book is a comprehensive review of U.S. efforts to achieve such development since Rio. The U.S. has unquestionably begun to take steps toward sustainable development. Yet the nation is now far from being a sustainable society, and in many respects is farther away than it was in 1992. Nevertheless, legal and policy tools are available to put the U.S. on a direct path to sustainability. This book brings together 42 distinguished experts from a variety of backgrounds and academic disciplines. It is among the most thorough assessments ever conducted of U.S. law and policy concerning the environment.