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| acid mine drainage (1) |
| archaeological and palaeontological resources (1) |
| Cradle of Humankind World Heritage Site (1) |
| dolomite, karst system (1) |
| risks and impacts (1) |
| Sterkfontein Caves (1) |
| acid mine drainage (1) |
| archaeological and palaeontological resources (1) |
| Cradle of Humankind World Heritage Site (1) |
| dolomite, karst system (1) |
| risks and impacts (1) |
| Sterkfontein Caves (1) |