what is mean by air pollution ?
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hi
Air pollution is a mixture of solid particles and gases in the air. Car emissions, chemicals from factories, dust, pollen and mold spores may be suspended as particles. Ozone, a gas, is a major part of air pollution in cities. When ozone forms air pollution, it's also called smog
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air pollution :-
contamination of air by harmful substances is called air pollution .
factors responsible for air pollution :-
1) poisonous gases
2) particulate matter
3) microbes
4) smoke
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