"Department of Heavy Industries has instituted a study on the emission levels by various diesel vehicles as compared to the source of air pollution," said Minister of State for Mansukh Lal Mandaviy
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/delhi-decide-phasing-out-old-diesel-cars-only-after-scientific-study
[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/diesel
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicles
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicular-pollution
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution-control
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/compensation
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution