First, though, he had to dive through a 40-foot vertical patch of murky, water-oil mixture that began 20 feet below the surface.
WSJ: Gulf's Fishing-for-Fun Culture Also Takes Hit
For example, some 1, 000 barrels of crude oil, water and gas mixture poured onto the tundra after a 2-foot gash formed in a pipeline in November 2009.
WSJ: As CEO Hayward Remade BP, Safety, Cost Drives Clashed
It extracts oil from the ground using a method called fracking - pumping down a mixture of sand, water and chemicals at high pressure.
BBC: US to become 'world's biggest oil producer'
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