the deadly smog that engulfed the capital in winter last year is back, and much earlier too. "Due to a drop in temperature during winter, the Earth's surface cools faster than the atmosphere. In such conditions, the layer of air between the Earth's surface and the atmosphere
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/return-smog-0
[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/health-effects
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/respiratory-diseases
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/delhi