Glossary and Acronyms

Sources (Pollution)

The origin of air contaminants, which can be a point source (coming from a defined site) or a nonpoint source (coming from many diffuse sources). Stationary sources include large, fixed facilities, such as power plants, chemical process industries, and petroleum refineries. Area sources are small, static, non-transportation sources that collectively contribute to air pollution, including dry cleaners and bakeries, surface coating operations, home furnaces, and crop burning. Mobile sources include on-road vehicles, such as cars, trucks, and buses, and off-road sources, such as trains, ships, airplanes, boats, lawnmowers, and construction equipment. Common mobile source-related pollutants are carbon monoxide, hydrocarbons, nitrogen oxides, and Particulate Matter.


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