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A point source of pollution is a single identifiable source of air, Water pollution, thermal, noise or light pollution. A point source has negligible extent, distinguishing it from other pollution source geometries. The sources are called ''point sources'' because in mathematical modeling, they can be approximated as a mathematical point to simplify analysis. 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 source, or volume source. *Water pollution from an oil refinery wastewater discharge outlet〔C.Michael Hogan. 2010. (''Water pollution'' ). Encyclopedia of Earth, Topic ed. Mark McGinley, ed. in chief C.Cleveland, National Council on Science and the Environment, Washington DC〕 * Noise pollution from a jet engine * Disruptive seismic vibration from a localized seismic study * Light pollution from an intrusive street light * Thermal pollution from an industrial process outfall * Radio emissions from an interference-producing electrical device ==References== 〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Point source pollution」の詳細全文を読む スポンサード リンク
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