PUBLIC HEALTH CRISIS AIR POLLUTION

Gurgaon pollution: Air turns ‘severe’, season’s first

The city's average air quality index (AQI) rose 159 points in 24 hours, from 310 (very poor) on Sunday to 469 (severe) on Monday. Meteorologists said calm winds and colder weather trapped pollutants over Delhi-NCR, creating a dome of smog over the region.