Dense fog was also reported at the Indira Gandhi Airport Wednesday morning, with visibility dropping to 100 metres between 5.30 am and 9 am.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/fog-covers-delhi-pollutant-levels-shoot
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/indian-express-new-delhi
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-quality-index-aqi
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/pm-25
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/indian-meteorological-department-imd
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/ministry-earth-sciences