This study assessed the contribution of automobile emission to CO, NO2 and SO2 in Niger
state, Nigeria. Three research questions were formulated to guide the study. The research
questions assessed the quantities of CO, NO2 and SO2 being emitted in the study area. Q-Rae
Plus Multi-gas Monitor was used to collect the data on the quantity of CO, while the Q-Trak
Plus IAQ Monitor was used to collect the data on the quantity of NO2 and SO2. Mean was the
statistical tool used to answer the research questions. The findings revealed among others,
that emission of CO, NO2 and SO2 from automobile in Niger State is higher than the
minimum Federal Environmental Protection Agency standard. Based on the findings of the
study, recommendations were made which among others include; Developing effective
control of automobile emissions quality management programmes; improvement of motor
traffic flow and control which requires good city road network; provision of reliable mass
transport system which will reduce the number of vehicles and motor cycles on Niger State
roads and therefore reduce emissions; and strengthening of the vehicle inspections and
maintenance department.