Delhi-NCR gasp for air as smog envelops region; Ghaziabad, Noida among most polluted cities

Delhi has recorded severe air quality on five of the last seven days after Diwali. The city recorded the Air Quality Index (AQI) at 454 at 9 am, while Faridabad (452), Ghaziabad (490), Greater Noida (476), Gurugram (418) and Noida (434) also recorded severe air quality