It is clear that all cities face a common threat
Links:
[1] http://admin.indiaenvironmentportal.org.in/reports-documents/2nd-final-report-particulate-pollution-reduction-strategy-seven-critically
[2] http://admin.indiaenvironmentportal.org.in/category/publisher/environment-pollution-prevention-control-authority
[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/environment-pollution-control-authority-epca
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cng
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/lpg
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/fuel-quality
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/fuel-adulteration
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/supreme-court
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/india
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/hyderabad-t
[13] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ahmedabad-t
[14] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bangalore-t
[15] http://admin.indiaenvironmentportal.org.in/category/thesaurus/pune-t
[16] http://admin.indiaenvironmentportal.org.in/category/thesaurus/sholapur-t
[17] http://admin.indiaenvironmentportal.org.in/category/thesaurus/chennai-t
[18] http://admin.indiaenvironmentportal.org.in/category/thesaurus/kanpur-t
[19] http://admin.indiaenvironmentportal.org.in/category/thesaurus/lucknow-t
[20] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-quality-and-health