Pollutant levels in the ambient air for 1998 were within the World Health Organisation and US Environmental Protection Agency permissible limits
Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/breath-fresh-air
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/down-earth
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution-control
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/transport
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/urban-planning
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/public-participation
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/governance
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/singapore
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/india
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/sustainable-development
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicles