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Air Pollution A Global Problem Air Pollution is the addition of harmful substances into the atmosphere resulting in continuing damage to the environment human health and the quality of life we experience The study of atmospheric or air pollution covers all those pollutants that are omitted into the atmosphere usually as gasses or particulates which then directly or indirectly degrade the physical and biological systems on the surface of the Earth Welburn 1 It not only affects people but also harms plants animals and the ecosystems in which they live It is changing the earths atmosphere so that it lets in more harmful radiation from the sun While at the same time our polluted atmosphere is becoming a better insulator preventing heat from escaping back into space and leading to a rise in global average temperatures Today man is capable of damaging many of the Earths natural cycles It appears inevitable that the extent of such potential disturbances keeps growing with the increase in the worlds population and the rate of industrialization Breuer xi Air pollution exists in gaseous or particulate forms The latter are particularly diverse in character consisting of many different components while gaseous air pollutants may be separated into primary and secondary forms Welburn 3 Primary air pollutants like sulfur dioxide most oxides of nitrogen carbon monoxide and un-burnt hydrocarbons are those directly emitted into the atmosphere Welburn 3 Secondary air pollutants like ozone and photo-activated irritants such as preoxyacetyl nitrate are formed as a consequence of subsequent reactions in the atmosphere involving primary pollutants and other agents such as strong light Welburn 3 Perhaps the least difficult of these problems are those caused by pollutants that come from only one or a few specific sources that can be pin pointed and readily controlled Leighton 164 Sulfur dioxide from smelters stack dust from cement plants fluorides from aluminum and phosphate plants industrial smoke and various exotic industrial gases and particulates are examples
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