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Chilean lawmakers have presented a bill that would force mining companies including Anglo American Plc and BHP Billiton Plc to run all of their copper mines in Chile using desalinated water from the Pacific Ocean.

The lower chamber of deputies’ measure that was introduced last month would require mines using more than 150 liters (40 gallons) of water a second to incorporate seawater in their operations, according to a statement on the Congress website. A third of the world’s copper supply comes from Chilean mines.

Read more at: http://www.bloomberg.com/news/2014-01-02/chile-debates-bill-making-mines-use-desalinated-seawater.html