التعدين إمدادات جوهانسبرغ. The Toxic Landscape of Johannesburg's Gold Mines WIRED. Jun 18, 2014 More than a century of gold mining has left towering piles of bleached mine waste, known as "tailings," all over Johannesburg's landscape. far it hasn't come into the main city's water supply, so no harm yet done to .
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