Before revision: Pollution point sources are identical to other physics, engineering, optics, and chemistry point sources and include: Air pollution from an industrial source (rather than an airport or a road, considered a line source, or a forest fire, which is considered an area and source, or volume source) Water pollution from factories, power plants, municipal sewage treatment plants and some farms (see concentrated animal feeding operation).
After revision: Pollution point sources are identical to other physics, engineering, optics, chemistry point sources and include: Air pollution from an industrial source (rather than an airport or a road, considered a line source, or a forest fire, which is considered an area and source, or volume source) Water pollution from factories, power plants, municipal sewage treatment plants and some farms (see concentrated animal feeding operation).