Answer:
Air pollution is the addition of particulate matter, gases
and vapours into the atmosphere these have an adverse effect on humans,
animals, vegetation and human assets. Air pollution is to two main types: 1, Natural (e.g., forest fire, dust storm,
pollen); 2. Human made (e.g., burning of fossil or fuels in industries,
vehicles and thermoelectric plants, gaseous emission from industries, mining
processing, stone crushing).
The particulate air pollutants are also called suspended
particulate matter or SPM because they remain suspended in air for a good
period of time. SPM consists of smokes, soot (a black powder substance that is
produced when coal. wood, etc., is burnt), fly ash and dust. (i.e., particles
of silica, grit, lead, asbestos, cement, sulphur, etc).
Gases that causes air pollution are sulphur dioxide,
nitrogen oxides, carbon monoxide.
hydrogen sulphide, hydrogen cyanides, hydrogen fluorides,
chlorine, methane and ammonia. They are formed from nitrogen, sulphur and
carbon compounds of fossil fuels and decaying organic matter. Pollutant vapours
include unburnt hydrocarbons (benzene).
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