Emission Sources

Emission sources are industrial plants, Motor Vehicles etc. which generate Air Pollutants and release them into the environment. One talks of point sources if Air Pollutants are released in high concentrations at one location, e.g. by industrial stacks. Numerous small sources make a plane source, e.g. leakages in pipes and fittings in large-scale industrial plants, e.g. refineries. House chimneys of residential areas can also be called a plane source. Streets with a high traffic volume, eg, represents line sources.