The air quality in Delhi and most NCR towns was ‘very poor’ as the concentration of particulate matter in the air increased.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/delhi-air-quality-touches-very-poor-likely-be-severe-today
[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/indian-meteorological-department-imd
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-quality-index-aqi
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/pm-25
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/rspm-pm-10