New Delhi, Jan. 7 -- The national capital saw a slight deterioration in air quality on Wednesday, with the overall Air Quality Index (AQI) touching 300 at 8 am, remaining in the 'poor' category, according to data from the Central Pollution Control Board (CPCB).

Earlier, the city had recorded an AQI of 288 on January 6. Despite the marginal decline, the air remained relatively clear, with a thin haze of fog enveloping the capital. Areas such as Kartavya Path were engulfed in dense fog due to a cold wave prevailing in the city this morning.

However, according to CPCB data, several areas in the city witnessed a decline in air quality. Anand Vihar recorded an AQI of 349, slipping into the 'very poor' category. Other areas, including Chandin...