National Environmental Policy Act in the context of "Dos Cuadras Offshore Oil Field"

A line source, as opposed to a point source, area source, or volume source, is a source of air, noise, water contamination or electromagnetic radiation that emanates from a linear (one-dimensional) geometry. The most prominent linear sources are roadway air pollution, aircraft air emissions, roadway noise, certain types of water pollution sources that emanate over a range of river extent rather than from a discrete point, elongated light tubes, certain dose models in medical physics and electromagnetic antennas. While point sources of pollution were studied since the late nineteenth century, linear sources did not receive much attention from scientists until the late 1960s, when environmental regulations for highways and airports began to emerge. At the same time, computers with the processing power to accommodate the data processing needs of the computer models required to tackle these one-dimensional sources became more available.

In addition, this era of the 1960s saw the first emergence of environmental scientists who spanned the disciplines required to accomplish these studies. For example, meteorologists, chemists, and computer scientists in the air pollution field were required to build complex models to address roadway air dispersion modeling. Prior to the 1960s, these specialities tended to work within their own disciplines, but with the advent of NEPA, the Clean Air Act, the Noise Control Act in the United States, and other seminal legislation, the era of multidisciplinary environmental science had begun.

An ongoing effort to remedy damage inflicted during the 20th century on the Everglades, a region of tropical wetlands in southern Florida, is the most expensive and comprehensive environmental repair attempt in history. The degradation of the Everglades became an issue in the United States in the early 1970s after a proposal to construct an airport in the Big Cypress Swamp. Studies indicated the airport would have destroyed the ecosystem in South Florida and Everglades National Park. After decades of destructive practices, both state and federal agencies are looking for ways to balance the needs of the natural environment in South Florida with urban and agricultural centers that have recently and rapidly grown in and near the Everglades. On June 27, 2025, a coalition led by Friends of the Everglades, the Center for Biological Diversity, and the Miccosukee Tribe of Indians filed suit in a federal court seeking an injunction against the installation of an immigration detention camp until a full environmental review and public-comment period are completed. Plaintiffs argue the project threatens endangered species habitat, including that of the Florida Panther, and violates both the National Environmental Policy Act and tribal cultural-resource protections.

In response to floods caused by hurricanes in 1947, the Central and Southern Florida Flood Control Project (C&SF) was established to construct flood control devices in the Everglades. The C&SF built 1,400 miles (2,300 km) of canals and levees between the 1950s and 1971 throughout South Florida. Their last venture was the C-38 canal, which straightened the Kissimmee River and caused catastrophic damage to animal habitats, adversely affecting water quality in the region. The canal became the first C&SF project to revert when the 22-mile (35 km) canal began to be backfilled, or refilled with the material excavated from it, in the 1980s.

Henry Martin "Scoop" Jackson (May 31, 1912 – September 1, 1983) was an American lawyer and politician who served as a U.S. representative (1941–1953) and U.S. senator (1953–1983) from the state of Washington. A Cold War liberal and anti-Communist member of the Democratic Party, Jackson supported higher military spending and a hard line against the Soviet Union, while also supporting social welfare programs, civil rights, and labor unions.

Born in Everett, Washington, to Norwegian immigrants, Jackson practiced law in Everett, after graduating from the University of Washington School of Law. He won election to Congress in 1940, and joined the Senate in 1953 after defeating incumbent Republican Party senator Harry P. Cain. Jackson supported the civil rights movement of the 1960s, and authored the National Environmental Policy Act, which helped establish the principle of publicly analyzing environmental impacts. He co-sponsored the Jackson–Vanik amendment, which denied normal trade relations to non-capitalist countries with restrictive emigration policies. Jackson served as chairman of the United States Senate Committee on Energy and Natural Resources from 1963 to 1981. He was twice an unsuccessful candidate for the Democratic Party nomination, in both the 1972 and 1976 presidential elections. While still serving in the Senate, Jackson died in 1983.