The Tribunal has banned petrol vehicles older than 15 years and diesel vehicles older than 10 years from plying in Delhi-NCR.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/you%E2%80%99ve-done-nothing-ngt-ministry-heavy-industries
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/indian-express-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicular-pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/national-green-trbunal-ngt
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ministry-heavy-industries-and-public-enterprises
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/diesel