Supreme Court order dated 05/04/2002 in the case of M. C. Mehta Vs Union of India and Ors on vehicular pollution in Delhi.
Links:
[1] http://admin.indiaenvironmentportal.org.in/reports-documents/supreme-court-order-dated-05042002-case-m-c-mehta-vs-union-india-and-ors-vehicular
[2] http://admin.indiaenvironmentportal.org.in/category/publisher/supreme-court-india
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicular-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/supreme-court
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/urban-air-quality
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cng
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/public-transport
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/fuel-quality
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/diesel
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicular-standards
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/petrol
[13] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution-control
[14] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment-act-1986
[15] http://admin.indiaenvironmentportal.org.in/category/thesaurus/respiratory-diseases
[16] http://admin.indiaenvironmentportal.org.in/category/thesaurus/heart-diseases
[17] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution