ROBERT BROOK / SCIENCE PHOTO LIBRARY ROBERT BROOK / SCIENCE PHOTO LIBRARY
Water treatment. Pipe carrying effluent from a sugar factory into a treatment lagoon. Here any toxins can be removed by sedimentation, filtration or bacterial action. A series of such lagoons may be used to make polluted waste water safe to release into the environment. Photographed in Shropshire, England.
Model release not required. Property release not required.