Russian President Vladimir Putin declared a state of emergency following massive diesel oil leak into a river in the Russian Arctic region. The spillage of 21,000 tonnes of diesel oil into a river near the Siberian city of Norilsk is feared to cause environmental damage for years to come. This spill, considered the largest one in the Russian Arctic Circle, has contaminated an area of 350 square kilometres, Russian state media report. Head of Russia's environmental watchdog, the Federal Service for Supervision of Natural Resources, Svetlana Radionova, has estimated the damage "at possibly hundreds of billions ... (full story)