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 Clean Water Act (CWA) requires states to calculate total maximum daily loads (TMDLs) of individual pollutants that impair their waters.

Established in over 65 countries and territories, marine protected areas (MPAs) embody a range of habitats, enable the provision of fundamental ecosystem services, protect marine biodiversity and cultural resources, and provide spaces to conduct cutting-edge research and implement innovative policies. Yet management of MPAs can face challenges, including the lack of adequate tools, the need for rules to secure comprehensive monitoring, the vastness of the ocean, and more.

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.