DR NEIL OVERY / SCIENCE PHOTO LIBRARY DR NEIL OVERY / SCIENCE PHOTO LIBRARY
Abandoned coal mine. View over a tailing pond at an abandoned coal mine in Mpumalanga, South Africa. Abandoned mining areas present a considerable environmental and health risk to local residents as they are often unstable and contaminated with toxic heavy metals. Tailing ponds are areas where waterborne refuse material is pumped into a pond to allow the sedimentation of solid material from the water.
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