DAVID NUNUK / SCIENCE PHOTO LIBRARY DAVID NUNUK / SCIENCE PHOTO LIBRARY
Oil plant settling pond, aerial photograph. The waste water in this settling pond contains crushed rock, sand, crude oil and bitumen. It has been piped here after the excavation and processing of oil-bearing sands at the nearby Syncrude extraction facility, in the Athabasca Oil Sands, Alberta, Canada.
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