The affected areas are not only in the surrounding countryside. Johannesburg itself sits on top of a gold mine and heaps of excavated soil are visual reminders of the city’s history. Even a major amusement park in the central business district, Gold Reef City, features a ride that goes through a mine shaft.
Experts say the cost of cleaning up derelict mines would be enormous and could accelerate the decline of the key mining industry in South Africa, one of the top five gold producing countries on the world.
http://www.voanews.com/english/news/africa/Johannesburg-Threatened-by-Toxic-Waters-139219729.html
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