Russian Arctic: Wildlife at risk from oil drilling
26 August 2013 Last updated at 14:09 BST
Russia is planning huge oil and gas developments in the Arctic Ocean off its northern coast - drilling that could threaten pristine wildlife habitats.
Large-scale production could begin in the next two decades, if the price of oil rises high enough, with preliminary exploration already under way.
But scientists say the region is home to important, thriving populations of walrus and polar bears, which could be put at risk.
Daniel Sandford reports from the Russian Arctic.