Which of the following statements about the Clean Air Act is TRUE?

The Clean Air Act is a comprehensive federal law in the United States that aims to regulate air emissions from stationary and mobile sources. Its effectiveness relies on the collaboration among federal, state, and local governments. This cooperative approach ensures that air quality standards can be tailored to address regional needs and circumstances, while still aligning with national objectives set by the Environmental Protection Agency (EPA).

By requiring this partnership, the Clean Air Act allows for better enforcement and implementation of air quality regulations, as states can develop and enforce their own plans that meet or exceed federal requirements. This collaboration also facilitates the sharing of resources and expertise, leading to more effective air quality management and improved public health outcomes.

The other statements do not accurately reflect the scope and purpose of the Clean Air Act, as it encompasses a broad range of air quality issues beyond just indoor air, it does not prohibit all industrial activities but rather regulates them, and it includes emission standards for various sources, not limited to vehicles alone.