1. Air Pollution and air pollution control
Impurities are mixed into the earth atmosphere or near the earth surface. Impurities include natural or artificial gases, as well as other particles.
Lower atmosphere called as tropospherecleanses these air pollutants. Rainfall also help to remove these impurities.
But rainfall converts into acid raindue to some pollutants like sulfates, nitrates etc. which can damage ourenvironment also the pollutants which mix in the upper atmosphere can causedamage to the ozone layer.
Naturalcontamination agents are salts & particular dust & gases.
ArtificialContamination agents are smoke & industrial gases, municipal waste,household waste . Automobile emissions , aircraft emission & rocket jet combustion.
Certain gases likefluorocarbon compounds used in spray cans affect the ozone layer in thestratosphere.
Also there aretrace gases & metals emitted in industrial operations.
Effects of air pollution
Air pollution affects health, damages agriculture, changes climate .
The pollutionproblems started becoming serious with the beginning of industrial revolution after the burning fuel like coal & oil began. Theaddition of motor vehicles added to the seriousness of the problem. These causedsome serious air pollution accidents in the Meuse valley in Belgium, in1948 Donora, Pennsylvania & in 1952 in London. These resulted in the deathof several persons
Different types of Air pollutioncan be specified in the following.
Gaseous -Carbon monoxide particulate smoke, pesticides, Aerosol sprays..
Inorganic - Hydrogen fluoride.
Organic - mercaptans.
Oxidizingsubstances - Ozone.
Reducingsubstances - Oxides of sulfur.
Radioactive substance-
Inertsubstance - Pollen or fly ash.
ThermalPollution - Heat from Nuclear Power Plants
Indoor air Pollution -Radon gas from soils & structure. Also
household chemicals in indoor air.
The toxic gas released into the air due to accident can be disastrous. The gases released Bhopal gas tragedy in 1984 , Killed 2000 People, in industrial Accident.
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