Walter A. Rosenbaum’s classic E nvironmental Politics and P olicy, Twelfth Edition, provides definitive coverage of environmental politics and policy, lively case material, and a balanced assessment of current environmental issues. The newly streamlined first half of the book sets needed context and describes the policy process, while the second half covers specific environmental issues such as air and water, toxic and hazardous substances, energy, and global policymaking on issues like climate change and trans-boundary politics. The Twelfth Edition includes updated case studies and a look at the transition in environmental policies between the Trump and Biden administrations, offering students a current and relevant look at the continuing challenge of reconciling sound science with practical politics.