The Endangered Species Act defines an endangered species as one at risk of extinction “throughout all or a significant portion of its range.” The U.S. Department of the Interior (DOI) has repeatedly defined “significant portion” to mean an area of the range essential to species persistence. This definition is redundant, and various iterations of the definition have been struck down in the past. At the same time, other proposals to list a species only in a portion of its range fail to satisfy the statutory requirements.

On March 11, 2019, the National Oceanic and Atmospheric Administration published an advance notice of proposed rulemaking to amend regulations that implement the Coastal Zone Management Act’s (CZMA’s) consistency requirement. This Article places the notice in context, focusing on the CZMA’s role in state review of offshore oil and gas development and its evolution to provide a predictable framework that balances coastal state interests with the nation’s energy needs.

The plastic packaging industry faces mounting shareholder and public pressure to reduce the environmental impact of post-consumer plastic packaging. The recycled plastics market in the United States is positioned for growth; however, developing a reliable supply of post-consumer plastics will be expensive because of problems in the recycling market. Reliance on export markets has limited investment in domestic recycling capacity, local collection programs vary considerably, and many consumers are ignorant about what can be recycled.

The U.S. Department of the Interior and National Oceanic and Atmospheric Administration recently finalized comprehensive changes in how the Endangered Species Act (ESA) is implemented. These changes address the species listing process, critical habitat designations, protections for threatened species, and the §7 consultation process.

Federal dams have been the focus of major disputes involving application of the Endangered Species Act (ESA), especially its §7 prohibitions on federal actions causing jeopardy to protected species. Operating agencies and project beneficiaries have sought to keep the ESA from restricting dam operations, including by arguing that such operations are non-discretionary and thus exempt. In proposing new ESA implementing rules, the Trump Administration suggested, but did not formally propose, that ongoing federal actions should be considered part of the “environmental baseline” for §7 purposes.

Do-It-Yourself biology, 3D printing, and the sharing economy are equipping ordinary people with new powers to shape their biological, physical, and social environments. This phenomenon of distributed innovation is yielding new goods and services, greater economic productivity, and new opportunities for fulfillment. Distributed innovation also brings new environmental, health, and security risks that demand oversight, yet conventional government regulation may be poorly suited to address these risks.

Cities often test the existing limits of their regulatory authority in areas like environmental protection, labor and employment, and immigration. The last few years witnessed an explosion of preemptive state legislation attacking, challenging, and overriding municipal ordinances across a wide range of policy areas. But this hostility to city government is not new. In 1915, one professor observed that “the relations of states to metropolitan cities in this country is ‘a history of repeated injuries’ .  .  .