SPUTNIK / SCIENCE PHOTO LIBRARY SPUTNIK / SCIENCE PHOTO LIBRARY
Ozone machine for water supplies. Worker checking equipment in a water pumping station room with an ozone machine (centre). The ozone machine is used to purify water supplies by killing bacteria in the water. Unlike chlorine, an alternative purification chemical, ozone does not form potentially harmful organochlorine compounds. This is the Rublevsky water pumping station near Moscow, Russia. Photographed on 12 April 2006.
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