Winner of the Julia Ward Howe Prize “The gripping story of the most important environmental law case ever decided by the Supreme Court.” —Scott Turow “In the tradition of A Civil Action, this book makes a compelling story of the court fight that paved the way for regulating the emissions now overheating the planet. It offers a poignant reminder of how far we’ve come—and how far we still must go.” —Bill McKibben, author of The End of Nature On an unseasonably warm October morning, an idealistic young lawyer working on a shoestring budget for an environmental organization no one had heard of hand-delivered a petition to the Environmental Protection Agency, asking it to restrict greenhouse gas emissions from new cars. The Clean Air Act authorized the EPA to regulate “any air pollutant” thought to endanger public health. But could carbon dioxide really be considered a harmful pollutant? And even if the EPA had the authority to regulate emissions, could it be forced to do so? The Rule of Five tells the dramatic story of how Joe Mendelson and the band of lawyers who joined him carried his case all the way to the Supreme Court. It reveals how accident, infighting, luck, superb lawyering, politics, and the arcane practices of the Supreme Court collided to produce a legal miracle. The final ruling in Massachusetts v. EPA, by a razor-thin 5–4 margin brilliantly crafted by Justice John Paul Stevens, paved the way to important environmental safeguards which the Trump administration fought hard to unravel and many now seek to expand. “There’s no better book if you want to understand the past, present, and future of environmental litigation.” —Elizabeth Kolbert, author of The Sixth Extinction “A riveting story, beautifully told.” —Foreign Affairs “Wonderful...A master class in how the Supreme Court works and, more broadly, how major cases navigate through the legal system.” —Science

Federal agencies have taken steps to include the public in a wide range of environmental decisions. Although some form of public participation is often required by law, agencies usually have broad discretion about the extent of that involvement. Approaches vary widely, from holding public information-gathering meetings to forming advisory groups to actively including citizens in making and implementing decisions. Proponents of public participation argue that those who must live with the outcome of an environmental decision should have some influence on it. Critics maintain that public participation slows decision making and can lower its quality by including people unfamiliar with the science involved. This book concludes that, when done correctly, public participation improves the quality of federal agencies' decisions about the environment. Well-managed public involvement also increases the legitimacy of decisions in the eyes of those affected by them, which makes it more likely that the decisions will be implemented effectively. This book recommends that agencies recognize public participation as valuable to their objectives, not just as a formality required by the law. It details principles and approaches agencies can use to successfully involve the public.

Many regulations issued by the U.S. Environmental Protection Agency (EPA) are based on the results of computer models. Models help EPA explain environmental phenomena in settings where direct observations are limited or unavailable, and anticipate the effects of agency policies on the environment, human health and the economy. Given the critical role played by models, the EPA asked the National Research Council to assess scientific issues related to the agency's selection and use of models in its decisions. The book recommends a series of guidelines and principles for improving agency models and decision-making processes. The centerpiece of the book's recommended vision is a life-cycle approach to model evaluation which includes peer review, corroboration of results, and other activities. This will enhance the agency's ability to respond to requirements from a 2001 law on information quality and improve policy development and implementation.