"Shrinking polar ice has opened up new opportunities, with five nations—Russia, Canada, Denmark, Norway and the US—claiming jurisdiction over parts of the polar region which could contain as much of one quarter of the world's undiscovered reserves of oil and gas. Russia's Prime Minister, Vladimir Putin, will attend the Arctic Forum in Moscow today as the stakes in the battle for control of the Arctic become ever higher. Russia, Canada and Denmark have all said they will file claims to the UN over an undersea mountain range called the Lomonosov Ridge, an area which some Russian scientists say could hold 75 billion barrels of oil. They all say the ridge is an underwater extension of their continental shelves."