Dhaka Air 'Very Unhealthy' Today, Third in World With Score of 221
The capital Dhaka ranks third today in the list of the world's cities with polluted air. According to data from the Switzerland-based air quality technology firm IQAir, Dhaka's air quality index score was 221 at around 8am on Sunday. That score is categorised as 'very unhealthy'.
In IQAir's live index, Lahore in Pakistan tops the polluted-air list for the day with a score of 252. Kolkata in India is in second place with a score of 243.
Beijing in China is fourth on the list with a score of 176. Mumbai in India is fifth with 175, and Vietnam's capital Hanoi is sixth with 170.
Under IQAir's standards, an air quality score of between zero and 50 is considered good. A score of 51 to 100 is treated as moderate or tolerable.
Under the same standards, a score of 101 to 150 is considered unhealthy for sensitive groups. A score of 151 to 200 is considered 'unhealthy'.
A score between 201 and 300 makes the air 'very unhealthy', and a score above 301 is counted as 'hazardous'. By that measure, Dhaka's air on Sunday morning, with a score of 221, was in the 'very unhealthy' range.
