The general prefernce for diesel vehicles is turning the air in Gujarat's cities toxic.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/slow-death-diesel
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-ahmedabad
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/gujarat
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/diesel
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/oil-pollution
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cng
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/central-pollution-control-board-cpcb
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/centre-science-and-environment-cse
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/congestion
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ahmedabad-t