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Soweto is home to 1.9 million people who are exposed to acid mine drainage

# Research has found that for 140 years, gold mines in Johannesburg have been leaking wastewater contaminated with heavy metals. The acid mine drainage from Johannesburg’s estimated 278 abandoned mines and 200 mine dumps includes uranium, copper, nickel and zinc. This has resulted in Soweto now being home to 1.9 million people who are exposed to acid mine drainage. The authors of the research say in cases of serious exposure to the heavy metals in acid mine drainage, birth defects, brain damage, cancer and miscarriages can result.