India, Dec. 10 -- New Delhi

Strong winds of speeds touching 18 kilometres per hour (kmph) brought some respite to Delhi, cleaning up the air and bringing down the Capital's air quality index (AQI) to "poor" level-only for the fourth time since November 1, since when it has largely remained in the "very poor" category.

The 24-hour average AQI was 282, according to the Central Pollution Control Board's (CPCB's) daily air quality bulletin released at 4pm. The AQI was 314 a day earlier. Also, the last time Delhi recorded a "poor" AQI day was on November 30, when the AQI was 279.

Weather forecasts have predicted winds of up to 20kmph on Wednesday, which is expected to further clean up the city's air, but the AQI is predicted to slip back in...