Dhaka, the overcrowded capital city of Bangladesh, has ranked ninth on the list of cities with the worst air quality with an AQI score of 155 at 9:50am on Monday. Dhaka’s air was classified as "unhealthy" referring to a threat, according to the AQI index. Such unhealthy air quality has continued for the past few days. When the AQI value for particle pollution is between 50 and 100, air... Details