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2016-03-14T13:28:32+05:30

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1)industries make a lot of air pollution by leaving out harmful gases
2)vehicles make a lot of pollution by giving out carbon monoxide etc
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2016-03-14T13:34:39+05:30
1.increasing no. of vehicles on road giving out harmful gases into air.
2.burning of fossil fuels.
3.industries emitting harmful toxic gases into air.
 4.burning of crackers. 
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burning of fossil fuels