Which federal agency oversees regulations regarding vehicle emissions?

The federal agency that oversees regulations regarding vehicle emissions is the Environmental Protection Agency (EPA). Established to protect human health and the environment, the EPA has the authority to establish and enforce regulations to limit air pollutants, including emissions from vehicles. This encompasses setting national standards for emissions that automakers must adhere to in order to minimize their impact on air quality and public health.

The EPA’s role is crucial in implementing the Clean Air Act, which mandates the regulation of emissions of hazardous air pollutants. This includes the assessment of emission limits for various classes of vehicles, promoting cleaner fuel technologies, and ensuring compliance with established standards through monitoring and inspection programs. By managing these regulations, the EPA plays a pivotal role in addressing and mitigating the effects of air pollution stemming from vehicular emissions.

This comprehensive authority positions the EPA as the key regulatory body for vehicle emissions, unlike the other agencies mentioned, which have different focuses.