The motor vehicle department recommended the government not to issue permits for diesel auto-rickshaws in Kochi and Kozhikode.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/mvd-recommends-government-only-cnglpg-auto-permits-be-issued-kochi-kozhikode
[2] http://admin.indiaenvironmentportal.org.in/category/author/k-p-sai-kiran
[3] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-thiruvananthapuram
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/kerala
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicular-pollution
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/diesel
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/kochi
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/kozhikode-t
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cng
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution-control
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicle-technology-and-fuel