Traffic congestion in the capital and smoke from brick kilns are the main reasons for air pollution in Dhaka city, according to the World Bank and the Bangladesh government.

The Ministry of Environment and Forests says that vehicles in Dhaka move 14kmph on an average, which is very slow and causes them to burn more fuel and contribute to air pollution. They say the average speed could come down to 4kmph by 2025 if things do not improve.