Sean Greene
February 15 2017

Industrial pollution has reached even the most remote corners of Earth: the deepest part of the sea.
Scientists have discovered “extraordinary levels” of polychlorinated biphenyls, or PCBs, in the Mariana and Kermadec trenches, two of the deepest ocean chasms on the planet.

“Trenches have been considered as pristine environments, but also (given their locations and topography) as likely sinks for contaminants that enter the marine environment,” Alan Jamieson, a marine ecologist at Newcastle University in England, wrote this week in the journal Nature Ecology & Evolution.

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