New Delhi, Dec. 25 -- The national capital witnessed a significant improvement in air quality on Thursday morning, with the overall Air Quality Index (AQI) recorded at 221 around 8 am. However, it remained in the 'poor' category, according to data from the Central Pollution Control Board (CPCB).

Air quality improved sharply compared to Wednesday, when the AQI was over 300. Despite this improvement, a thin layer of smog persists in parts of the city, and overall air quality remains poor.

In Anand Vihar, a thin layer of smog lingered, although visibility was relatively clear, with an AQI of 292, placing it in the 'poor' category. Additionally, a thin layer of smog engulfed areas around Dhaula Kuan, Akshardham and India Gate this morning....