What is Air pollution?

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gsenviro | College Teacher | (Level 1) Educator Emeritus

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Air pollution is the presence of impurities in the air that may cause health and other risks to human beings, animals and structures. These impurities could be natural or man-made and include dust, gases, microorganisms, etc. Natural causes of air pollution includes, dust storms and volcanic eruption; while the man-made causes include combustion of fossil fuels in automobiles and industries, among others.

Air pollution is a global phenomena and is not limited to regional and national boundaries. Events of air pollution may, most commonly, include excess dust or gases in the air. The harmful effects of air pollution include breathing troubles, lack of visibility, death, etc. Air pollutants such as nitrogenous and sulfurous compounds may also affect buildings and structures through acid rain. 

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srssll | eNotes Newbie

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Certain gases, fumes, dust, and dirt can be present in the air in harmful quantities.  When these substances(pollutants) cause damaging effects to people, plants, and animals they are creating air pollution.

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