On Wednesday, the Supreme Court had announced that India will transit from the Bharat Stage (BS)-IV emission norms currently in place, to the BS-VI norms on April 1, 2020.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/explained-changing-bharat-stage-bs-iv-bs-vi
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-new-delhi
[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/bharat-stage-iv
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/oxides-nitrogen-nox
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/carbon-monoxide
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicle-technology-and-fuel