An aerial view shows the pollution in a river outside Norilsk on June 6, 2020. - Russian President Vladimir Putin on June 3, ordered a state of emergency and criticised a subsidiary of metals giant Norilsk Nickel after a massive diesel spill into a Siberian river. The spill of over 20,000 tonnes of diesel fuel took place on May 29, 2020. A fuel reservoir collapsed at a power plant near the city of Norilsk, located above the Arctic Circle, and leaked into a nearby river. (Photo by Irina YARINSKAYA / AFP) (Photo by IRINA YARINSKAYA/AFP via Getty Images)