South African gold mines choke the poor

Mining has a long history in South Africa, beginning with diamonds, and then followed by gold from the 1870s onwards.
 
The gold mining sector has since expanded into the largest in the world, but declining reserves have led to the closure of hundreds of mines around South Africa’s largest city, Johannesburg. The legacy includespolluted ponds and huge piles of waste called ‘tailings’.
 
This audio slideshow visits a site where these tailings sit beside some of the country’s poorest communities, contaminating both their air andwater supplies. 
http://www.scidev.net/global/water/multimedia/south-african-gold-mines-poor.html