In this photo taken Wednesday, Jan. 26, 2011, a supervisor looks over a water purification plant in Randfontein, South Africa, west of Johannesburg. South Africans are increasingly worried about the ... more 
In this photo taken Wednesday, Jan. 26, 2011, a supervisor looks over a water purification plant in Randfontein, South Africa, west of Johannesburg. South Africans are increasingly worried about the risks contaminated water from mining poses to the rest of Johannesburg which is built over one of the largest gold mining bases in the world. less 
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Associated Press | Photo By Denis Farrell
Sat, Mar 26, 2011 2:03 PM EDT