air pollution Video: What is causing this hazardous level of air pollution in Delhi Why Delhi is buried in smog every year and how the government is tackling it this time around. Shoaib Daniyal Nov 11, 2017 · 04:00 pm Play Producer: Neelima | Camera: Aabid Shafi Support our journalism by subscribing to Scroll+. We welcome your comments at letters@scroll.in. Air pollution Smog Delhi Crop burning Particulate matter PM 2.5