Lawani, S. A.Adebayo, G. B.2021-05-242021-05-241998https://uilspace.unilorin.edu.ng/handle/20.500.12484/5402Sulphur (IV) Oxide concentrations at a busy round-about in the city of 1I0rin versus lime of day were measured on 4 different days staggered throughout the month for 12 months 0+ the year. The results showed that the highest peaks occurred at 8-9a and 3-4p.m. each day. These two time periods corresponded to the busy hours when workers were going to their offices and returning home respectively. Comparison of the values obtained at the round-about with those at a remote rural area suggests that the relatively high SO2concentration at the round-about came from motor vehicles. While the measured SO2 levels are within the range that is tolerable for human beings, the low levels obtained might be harmful to children, the elderly and people with chronic respiratory problems.ensulphur (IV) Oxideremote rural, round-aboutArticle