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.

Enhanced oil recovery has generated an immense and growing market for carbon dioxide (CO2), which has uses in manufacturing, medical, and industrial settings. In the next 30 years, these combined end-uses will necessitate a three- to fivefold expansion of existing CO2 transportation infrastructure in the United States. A more flexible, extensive, and integrated CO2 pipeline network is necessary to accommodate this growing demand.

In September 2019, in an article entitled “The Market Has Spoken: Coal Is Dying,” Matt Egan of CNN Business wrote, "President Donald Trump has gutted regulations on the coal industry, falsely claimed that windmills cause cancer and installed a former coal lobbyist to lead the [U.S. Environmental Protection Agency] EPA. In the face of those efforts to rescue coal country, America’s aging fleet of coal-fired plants continues to shrink. New plants are not getting built. Trump’s vow to rip up environmental rules has been overwhelmed by an even more powerful force: the free market.

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.

The National Highway Transportation Safety Administration (NHTSA) and the U.S. Environmental Protection Agency (EPA) have proposed a new reading of the Energy Policy and Conservation Act of 1975 (EPCA) that governs federal fuel economy standards. The regulations would relax federal greenhouse gas tailpipe standards and fuel economy standards, and preempt emissions standards put in place by California and adopted by other states.

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.

Prof. Richard L. Revesz and Dr. Burcin Unel provide a useful, albeit no longer current, review of electric energy storage in Managing the Future of the Electricity Grid: Energy Storage and Greenhouse Gas Emissions (Managing). The energy storage market has continued its rapid technical and manufacturing evolution. Those advances may reasonably be expected to impact today’s regulatory aims and frameworks, just as prior technological progress influenced administrative goals and processes.