The air quality in the city was back in the `very poor` category on Wednesday with an AQI reading of 336, according to data from the Central Pollution Control Board`s Sameer app. (Pics/PTI)

Residents of Delhi and the National Capital Region (NCR) experienced marginal relief on Tuesday as weather conditions led to a slight improvement in air quality and visibility. The change came after north-westerly surface winds helped disperse the thick fog and haze that had blanketed the region a day earlier. (Pics/PTI)