A study on Delhi AQI data of of the Sept 15-Oct 15 periods from 2024-2026, released on Wednesday, says crop burning isn’t behind the change in Delhi’s air this year, and points to “local, non-agricultural sources” instead. Over 700 cases of stubble burning have been recorded across Punjab, with plumes of smoke rising from agricultural fields in districts like Tarn Taran, Amritsar, and Sangrur.