Introduction

This study is focused on the measurement and analysis of the emission levels of different vehicles and their comparison with standards. Contribution of auto-exhaust on the total air pollution of Dhaka city was also studied. The study has revealed that automobiles are the principal contributors of SOx, NOx, CO and hydrocarbon emissions in Dhaka city and the emission level of the vehicles playing over Dhaka city is alarming. The concentrations of suspended particulate matters, CO, SOx and NOx in the ambient air exceed the standard values set by the Department of Environment of Bangladesh at several points of heavy traffic congestion. Therefore, immediate actions should be undertaken to improve the air quality of Dhaka city. Some recommendations for air pollution control in Dhaka city are also incorporated in the paper.