how does industries pollute air
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Industries pollute air by releasing various toxic gases in the atmosphere such as carbon monoxide. Smoke is emitted by chemical and paper factories, refineries etc. The burning of fossil fuels also pollutes air.
Industries discharge chemical wastes comprising substances called effluents in rivers, lakes, streams etc. Factories sometimes turn waterways into open sewers by dumping oil, toxic chemicals and other harmful liquids called effluents into them.
Air pollution is caused by the presence of high proportion of undesirable gases, such as sulphur dioxide and cabon monoxide, dust sprays, mist and smoke in the atmosphere due to emission from industrial units.
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