Giant open-pit #Chilean #Copper mine moves underground

#Chilean miners at one of the world’s biggest open-pit mines will soon be digging for #Copper underground, in a move to extend the life of the century-old site for 40 years.

Read more at: http://timesofindia.indiatimes.com/business/international-business/Giant-open-pit-Chilean-copper-mine-moves-underground/articleshow/52364373.cms

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