For context, an Air Quality Index or AQI rating of 0-50 represents ‘good’ quality of air while 51-100 is considered ‘moderate’ and 101-150 is deemed ‘dangerous’. But the air quality is classified as ‘unhealthy’ when the PM levels reach 150-200, ‘very unhealthy’ at 201-300 and ‘hazardous’ at 301-500. Unplanned construction, smoke emissions from vehicles and the burning of bricks are the major causes of air pollution ahead of winter every year, said Air Quality Management Project Director Ziaul Haque. He recommends publishing the air quality forecast to allow people to take preventative measures against air pollution. Developed countries – and even India -- forecast the air quality to allow people to avoid the polluted air,” said Masud.

Source: bd News24 November 15, 2019 11:37 UTC