One of the most talked-about topics on social media right now is the filthy, hazy, air pollution in Dhaka. With winter officially here, it is no secret that the bustling city's air quality has been "unhealthy," "very unhealthy," and "hazardous" on some days, according to the Air Quality Index (AQI).

It poses the greatest environmental threat to human health

No visible progress in curbing air pollution in Dhaka

Urgent, coordinated measures needed to reduce air pollution

Md Ziaul Haque, the director of Air Quality Management at the Department of Environment, talks with Naznin Tithi of The Daily Star about the factors behind severe air pollution in the country and why concerted efforts are needed from all ministries and government agencies concerned to fight it.