SPUTNIK / SCIENCE PHOTO LIBRARY SPUTNIK / SCIENCE PHOTO LIBRARY
Kapotnya oil refinery, Moscow, Russia, aerial photograph. This view shows the site on 15 May 2017, the day after a reported excess emission of pollutants. On 14 May 2017, automatic monitoring stations reported a level of hydrogen sulphide in the air over 50 times the permissible levels.
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