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As the strike at the world's biggest copper mine Escondida approaches its 9th day...workers at Collahuasi have also begun a 24-hour strike over production bonuses.
Collahuasi is the world’s third biggest copper mine.
Stoppages at Escondida and Collahuasi may reduce world copper supply by about 10%.
Since the 22 July Escondida strike began...copper prices have climbed 2.2%.
