Dhaka, Bangladesh

Dhaka, Bangladesh, a megacity with 22 million inhabitants, contends with consistently poor air quality throughout the year. The city's annual average PM2.5 level is 97 µg/m³. This figure often rises above 150 µg/m³ during the drier months, driven by emissions from cheap diesel generators and numerous brick kilns. Despite the persistent pollution challenges, Dhaka currently lacks an enforceable emission standard to regulate industrial and vehicular output, contributing to the ongoing environmental and public health concerns.