Order of the Supreme Court of India in the matter of M. C. Mehta Vs Union of India & Others dated 13/08/2018 regarding a comprehensive action plan for air pollution control with timelines. The matter deals with stickers for vehicles to indicate the nature of fuel being used. 
[2]It is agreed that a hologram based sticker of light blue colour should be used for petrol/CNG vehicles and a hologram based sticker of orange colour should be used for diesel vehicles applicable for NCR Region.
Technology Partners: MimirTech
Links:
[1] http://admin.indiaenvironmentportal.org.in/content/order-supreme-court-india-regarding-comprehensive-action-plan-air-pollution-control-13082018
[2] http://www.indiaenvironmentportal.org.in/files/file/hydrogen_fuel_buses_ SC_Order.pdf
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicular-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution-control
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/supreme-court
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/sunita-narain
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment-pollution-control-authority-epca
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/electric-vehicles
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/hybrid-electric
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cng
