As fog continued to cover the capital city on Sunday morning, trains services have taken a hit in Delhi and NCR with 73 trains being affected.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/dense-fog-low-visibility-hit-delhi-again-air-pollution-remains-poor
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/zee-news
[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-standards
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/pm-25
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/indian-meteorological-department-imd