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Timeline of pollution in Delhi

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| 1982 || || || Delhi passes its first Industrial Policy.<ref name="Pollution in Delhi : A Chronic Problem">{{cite web |title=Pollution in Delhi : A Chronic Problem |url=https://www.jagranjosh.com/current-affairs/pollution-in-delhi-a-chronic-problem-1510211965-1 |website=jagranjosh.com |accessdate=9 May 2019}}</ref>
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| 1985 || || {{w|Air pollution}} || The [[{{w:|Supreme Court of India]] }} states veredict to deal with the chronic problem of vehicular pollution in Delhi, one of the earliest stand taken by judiciary.<ref name="Pollution in Delhi : A Chronic Problem"/>
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| 1987 || || {{w|Air pollution}} || A survey estimates that 1172 tonnes of suspended particulate matter, hydrocarbons, sulphur dioxide, nitrogen oxides, carbon monoxide and other poisonous gases are spewed into the air in Delhi by industrial units, the various modes of transport and the power sector.<ref name="Air Pollutionf"/>
| 1994 || || {{w|Water pollution}} || The Supreme Court takes ''[[w:Sua sponte|suo motu]]'' notice of a newspaper report about the pollution of the {{w|Yamuna}}.<ref name="Environmentalism"/>
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| 1995 || || || The [[{{w:|Supreme Court of India]] }} asks the Delhi Pollution Control Committee to categorize all industrial units in the city according to pollution hazard they pose.<ref name="Forging Environmentalism: Justice, Livelihood, and Contested Environments">{{cite book |last1=Bauer |first1=Joanne R. |title=Forging Environmentalism: Justice, Livelihood, and Contested Environments |url=https://books.google.com.ar/books?id=c5amHzE241EC&pg=PA198&lpg=PA198&dq=delhi+pollution+%22in+1990..1999%22&source=bl&ots=pTitq09Rse&sig=ACfU3U07H9wh6Fql_c2u_yDBo0XYXbM9Eg&hl=en&sa=X&ved=2ahUKEwjHoLaP94ziAhVbJrkGHc6XD0oQ6AEwAXoECAkQAQ#v=onepage&q=delhi%20pollution%20%22in%201990..1999%22&f=false}}</ref>
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| 1995 || || || Delhi government introduces catalytic converter in passenger cars as vehicle control measure policy to curb air pollution in the city.<ref name="Pollution in Delhi : A Chronic Problem"/>
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| 1996 || February || {{w|Water pollution}} || The [[{{w:|Supreme Court of India]] }} orders the Delhi state government to construct common effluent treatment plants, which the industries are required to pay for, to reduce water pollution.<ref name="Forging Environmentalism: Justice, Livelihood, and Contested Environments"/>
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| 1996 || April || || The [[{{w:|Supreme Court of India]] }} orders the relocation of factories away from residential areas.<ref name="Forging Environmentalism: Justice, Livelihood, and Contested Environments"/>
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| 1997 || || {{w|Air pollution}} || The annual suspended particulate matter average concentration in Delhi is 339.3 microgrammes per cubic meter.<ref name="Air Pollutionf">{{cite book |last1=Agarwal |first1=S. K. |title=Air Pollution |url=https://books.google.com.ar/books?id=dJlxyyLX0MoC&pg=PA21&lpg=PA21&dq=delhi+pollution+%22in+1990..1999%22&source=bl&ots=DEtF0ZVr2F&sig=ACfU3U1KGOrShtCgl4aKK6gcnO6XdSnwuQ&hl=en&sa=X&ved=2ahUKEwjHoLaP94ziAhVbJrkGHc6XD0oQ6AEwAnoECAgQAQ#v=onepage&q=delhi%20pollution%20%22in%201990..1999%22&f=false}}</ref>
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| 1998 || || {{w|Air pollution}} || The [[{{w:|Supreme Court of India]] }} orders a major transformation of Delhi's transportation system, in response to a public interest petition on air pollution.<ref name="Forging Environmentalism: Justice, Livelihood, and Contested Environments"/>
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| 1998 || || || Delhi government introduces unleaded petrol as vehicle control measure policy to curb air pollution in the city.<ref name="Pollution in Delhi : A Chronic Problem"/>
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