Air pollution poses a major threat to human health. It is estimated
that 91% of the world’s people live in places that did not meet
the air quality guidelines of the World Health Organization
(WHO, 2019a). Exposure to air pollution is well-established to
be associated with adverse health effects, including respiratory
conditions, either exacerbating existing diseases or increasing
susceptibility to respiratory and other infections (WHO, 2019b).
Currently many areas in South Africa exceed National Ambient
Air Quality Standards. Priority Areas of air pollution hotspots are
being managed to try to improve air quality (SA DEA, 2019).