Chlorofluorocarbons are not typically emitted by vehicles, but are associated with refrigeration and aerosol products.

The Clean Air Act is the primary federal law that regulates air pollution, including emissions from motor vehicles.

Lead is not a criteria pollutant with a NAAQS, but is regulated under other provisions of the Clean Air Act.

A non-attainment area is a geographic area that does not meet the NAAQS for a particular pollutant.

AdBlue is not an emission control technology, but is a chemical used in selective catalytic reduction systems to reduce nitrogen oxide emissions.

Cap and trade is a program that allows states to trade emission credits between sources in order to achieve air quality goals.

Natural gas vehicles are not considered alternative fuel vehicles under the Clean Air Act.

The Alternative Fuel Vehicle Tax Credit is a federal program that provides financial incentives for the purchase of alternative fuel vehicles.

Congestion pricing is not typically implemented by local governments as an air pollution control measure.

The Corporate Average Fuel Economy (CAFE) standards are federal laws that require manufacturers to produce vehicles that meet certain fuel economy standards.

Improving traffic flow is not typically considered a transportation-related air pollution control strategy.

State Implementation Plans are federal laws that require states to develop and implement plans to reduce air pollution from transportation sources.

AdBlue is not an emission control technology used to reduce emissions from diesel engines.

The Congestion Mitigation and Air Quality Improvement (CMAQ) program is a federal program that provides funding for transportation projects that reduce air pollution.

Charging for employee parking is not typically considered an air pollution control measure that can be implemented by employers.