Fig. 2From: Occupation exposed to road-traffic emissions and respiratory health among Congolese transit workers, particularly bus conductors, in Kinshasa: a cross-sectional studyPollutants concentration in different locations. Particulate matter 2.5 (PM2.5 μg/m3), Nitrogen dioxide (NO2 μg/m3), Sulfur dioxide (SO2 μg/m3), Microgram per cubic meter (μg/m3)Back to article page