All stations in Delhi recorded an AQI of over 400 on Sunday, with Bawana (490), Ashok Vihar (487) and Wazirpur (483) appearing as the most polluted at the 7 pm mark.

New Delhi, Nov 17 (PTI) Installing the flue-gas desulfurisation ... the slow pace of implementation has raised concerns about the effectiveness of these regulations. Delhi’s air quality worsened ...