Plants thrive on carbon dioxide. Shouldn't we be happy about all the extra CO2 in the air? It will make more plants grow and feed more people.
Anyway, how did all that "excess carbon" from "industrialized countries" make it all the way to South Africa? My guess is that they get more CO2 from the burning equatorial rain forest on their own continent than they do from "industry" in North America, thousands of miles away.
Back in the 1970’s, South Africa was a relatively industrialized country, the ONLY ONE in Africa. Today, it’s a hell-hole. And it wasn’t the weather climate that changed, it was the political climate.