In Snake Park, Soweto, activist Thokozile Mntambo is training her community to help her research whether the mine dump towering over their homes is making them sick.
A century of gold mining on the Witwatersrand has left mountains of waste that contain heavy metals and toxins.
Snake Parks volunteers believe the tailings dust is the source of many residents breathing problems, chronic sicknesses and birth defects.
In recent years, climate change has increased the threat as storms and heavy rains can turn tailings into floods of toxic sludge.
Now a new mining company, Pan African Resources, is set to re-mine the areas dumps will this improve anything?
Read the full script for this video here .
Read Pan African Resources response here .
