A fuel tank at a power station in the remote, industrial Arctic city of Norilsk lost pressure on May 29 and leaked 20,000 tonnes of fuel and lubricants, the Investigative Committee, a law enforcement agency, said. Much of it flowed into the river of Ambarnaya which authorities say “it will take decades to clean it up” because “there will be enough pollution to poison the environment for years to come and it will require recultivation, cleaning which will take years."