NEW DELHI: Five out of the top 10 most-polluted cities in the world are in Delhi-NCR with Gurgaon being at the number 1 spot clocking an annual average PM2.5 reading of 135.8 micrograms per cubic m
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/rank-bad-air-5-world%E2%80%99s-10-worst-ncr
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/times-india-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/pm-25
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/who
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/greenpeace
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-quality-standards