Links:
[1] http://admin.indiaenvironmentportal.org.in/reports-documents/who-global-urban-ambient-air-pollution-database-update-2016
[2] http://www.who.int/airpollution/data/cities/en/
[3] http://admin.indiaenvironmentportal.org.in/category/publisher/world-health-organization
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/urban-air-quality
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/india
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/beijing
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/china
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/respiratory-diseases
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/non-communicable-diseases
[13] http://admin.indiaenvironmentportal.org.in/category/thesaurus/africa
[14] http://admin.indiaenvironmentportal.org.in/category/thesaurus/asia
[15] http://admin.indiaenvironmentportal.org.in/category/thesaurus/biomass-burning
[16] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rspm-pm-10
[17] http://admin.indiaenvironmentportal.org.in/category/thesaurus/pm-25