Believe it or not, Bangladesh had the least breathable air in the world in 2021, while its capital Dhaka was the second most polluted city. These are the findings of IQAIR’s World Air Quality Report 2021. The global real-time air quality information platform published its air quality report for last year on Monday. Apart from Bangladesh, Chad, Pakistan, Tajikistan and India topped in the ranking of the five most polluted countries across the globe, according to the report.