Fig. 3: Comparison of BC/PM2.5 ratio (columns; %) and the corresponding BC concentrations (diamonds, with error bar as the standard deviation) reported in major cities globally.
From: Black carbon emissions from traffic contribute substantially to air pollution in Nairobi, Kenya
Different colours/shades are used to represent cities in different regions for ease of comparison. Nairobi* refers to this study. A detailed compilation and references are provided in SI Table S2.
