ExtinctionR, 
Cost means there is a lack of controls and a lack of monitoring of air pollution in Africa. What is known is that the most polluted cities in Africa exceed WHO PM2.5 limits by a factor of eight to eleven times.
#Africa #pollution #climate #smog #airpollution
https://www.dw.com/en/africas-fight-against-health-risks-of-urban-air-pollution/a-68757907