Delhi’s air quality hit stupendous lows as AQI jumps even 17-18 times the maximum acceptable limit at the onset of winter, before and after Diwali. But Delhi & northern India’s air quality is consistently low throughout the year. In episode 614 of ThePrint’s Cut The Clutter, Shekhar Gupta refers to an IIT Kanpur study to dissect the various factors behind Delhi’s poor AQI. He also briefly explains the ongoing tussle between the Centre and the state of Punjab, and why history tells us that conflict resolution is the best approach to Punjab.