India, Dec. 22 -- The air quality in the Capital deteriorated to the "severe" zone again on Sunday, after the air quality index (AQI) over the past day provided a much-needed respite from a four-day streak of "severe" AQI from last Tuesday to Friday, according to the Central Pollution Control Board's (CPCB's) daily air bulletin.

With an average 24-hour AQI reading of 409 recorded on the day, Delhi clocked five days of "severe" air in a six-day period, marking the highest such streak since six consecutive days of "severe" air were clocked in December 2021. Experts attributed the dropping air quality, observed since last Sunday, to a decrease in wind speed.

"The decrease in wind speed aided the already accumulating levels of pollution in ...