Dhaka, Feb. 13 -- Dhaka, the densely populated capital of Bangladesh, ranked third among the world's most polluted cities on Friday morning, recording an Air Quality Index (AQI) of 214 at 10:34 am.

Some countries have to choose between development and the environment. We don't.

New Delhi (CNN) — It’s easy to tell when it’s smog season in New Delhi; the air gets darker, heavier and starts scratching the throats and testing the lungs of the city’s 34 million residents.

Smog settles around Delhi's famed Red Fort in the early hours of November. - Sanchit Khanna/Hindustan Times/Getty Images It’s easy to tell when it’s smog season in New Delhi; the air gets darker, ...