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The 10 worst pollution problems in the world

Oct. 16, 2009, 11:21 p.m.
Industrial mining site

Photo: Wim Burger/iStockphoto

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Industrial mining

Excavating minerals is a dirty process. Rolling hills become piles of wreckage with toxic elements buried among the waste. As rain and air mix with the rubble, the slurry seeps down the hills and trickles into nearby surface and groundwater.