The air quality in Delhi remained in the 'very poor' category, with a layer of toxic haze blanketing the national capital on Monday morning, according to the Central Pollution Control Board (CPCB).

At 9 am, Delhi's overall Air Quality Index (AQI) stood at 345, CPCB data showed. Visuals from across the city showed a thick layer of haze reducing visibility in several areas.

The city's air quality deteriorated sharply on Sunday morning, reaching this season's worst level of 391 before slightly improving later in the day. At 4 pm, the overall AQI stood at 370, placing Delhi in the 'red zone', CPCB data showed. A blanket of smog has persisted over the city since Diwali, with air quality oscillating between the 'poor' and 'very poor' categories, and occasionally slipping into the \"severe\" zo

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