In the real-time air quality ranking on Thursday, Dhaka scored 187 and was classified as “unhealthy,” according to AirVisual. On Tuesday, Dhaka remained on top of the air quality index for some time, scoring 361, and was also classified as “hazardous.”United States environmental experts developed the Air Quality Index (AQI) to rank air quality. Also Read- Dhaka’s air quality ‘unhealthy’, ranked 5th worst on AQIMany environmental experts blame the ongoing construction of Metro Rail in this regard. The study also suggested that better air quality could lead to significant extension of human lifespan around the world. Also Read- Sound pollution: Beyond permissible levels in all divisionsAn AQI value over 300 represents hazardous air quality, and below 50 the air quality is good.

Source: Dhaka Tribune February 21, 2019 04:07 UTC