Dhaka has ranked fourth on the list of cities with the worst air quality with an AQI score of 234 at 9am on Sunday. Today’s air was classified as 'very unhealthy’ and such air quality continued for the past few days, according to the AQI index. India’s Delhi, Pakistan’s Lahore and Democratic Republic of the Congo’s Kinshasa occupied the first, second and third spots in the list, with AQI scores of 666, 358 and 272 respectively. W