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.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/traffic-jam-polluting-air
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/daily-star-bangladesh
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/bangladesh
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/south-asia
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-pollution
[6] http://admin.indiaenvironmentportal.org.in/category/thesaurus/dhaka
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/congestion
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/world-bank
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/vehicular-pollution
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/environment-impact-assessment-eia
[11] http://admin.indiaenvironmentportal.org.in/category/thesaurus/health-effects
[12] http://admin.indiaenvironmentportal.org.in/category/thesaurus/diesel
[13] http://admin.indiaenvironmentportal.org.in/category/thesaurus/air-quality-standards
[14] http://admin.indiaenvironmentportal.org.in/category/thesaurus/carbon-monoxide
[15] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mercury
[16] http://admin.indiaenvironmentportal.org.in/category/thesaurus/nickel