Ambient Air Quality Standards: National standards set by the Environmental Protection Agency (EPA) to limit the concentration of certain air pollutants, such as ozone, particulate matter, and carbon monoxide, in the ambient (outdoor) air.
Emissions Trading: A market-based approach that allows companies to buy and sell permits to emit certain air pollutants, providing an incentive to reduce emissions and promote cost-effective pollution control.
Air Pollution Control Devices: Technologies installed on industrial and commercial facilities to reduce the emission of air pollutants, such as scrubbers, catalytic converters, and particulate filters.