Dhaka, April 30 -- Dhaka, the densely populated capital of Bangladesh, ranked 5th among the world's most polluted cities on Thursday morning, with an Air Quality Index (AQI) of 134 at 09:14 am.

The air was classified as 'Unhealthy for sensitive group', meaning affect people with underlying conditions, children, and older adults, while the general public is likely unaffected, according to the AQI scale.

India's Delhi, Pakistan's Lahore and Indonesia's Jakarta were the three most polluted cities, with AQI scores of 172, 156 and 154.

An AQI between 101 and 150 is considered 'unhealthy for sensitive groups', while 151-200 is 'unhealthy', 201-300 is 'very unhealthy', and anything above 301 is 'hazardous' and can cause serious health problem...