Which federal law is primarily responsible for regulating the emission of air pollutants from stationary sources in the United States?

Which federal law is primarily responsible for regulating the emission of air pollutants from stationary sources in the United States?

• A. Clean Water Act
• B. National Environmental Policy Act (NEPA)
• C. Endangered Species Act
• D. Clean Air Act

Answer: (D)

The key idea is identifying the federal statute that controls air pollution from fixed facilities. The Clean Air Act is the main framework that gives the federal government authority to regulate emissions from stationary sources like factories and power plants. It empowers the EPA to set national air quality standards, establish emission limits, and require facilities to obtain permits and undergo reviews (such as new source review and Title V permitting) to ensure they don’t degrade air quality. While it also covers mobile sources, its core role in this context is regulating emissions from fixed, or stationary, sources. The other laws focus on different environmental areas: the Clean Water Act handles discharges into water, NEPA requires environmental impact assessments for federal actions, and the Endangered Species Act protects at-risk species and habitats.

The key idea is identifying the federal statute that controls air pollution from fixed facilities. The Clean Air Act is the main framework that gives the federal government authority to regulate emissions from stationary sources like factories and power plants. It empowers the EPA to set national air quality standards, establish emission limits, and require facilities to obtain permits and undergo reviews (such as new source review and Title V permitting) to ensure they don’t degrade air quality. While it also covers mobile sources, its core role in this context is regulating emissions from fixed, or stationary, sources. The other laws focus on different environmental areas: the Clean Water Act handles discharges into water, NEPA requires environmental impact assessments for federal actions, and the Endangered Species Act protects at-risk species and habitats.