Links:
[1] http://admin.indiaenvironmentportal.org.in/news/gear-battery-cars
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/asian-age-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution-control
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicular-pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/hybrid-electric
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/battery-vehicles
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi