EditorialFILE PHOTO: An aerial view shows the brine pools and processing areas of the SQM lithium mine on the Atacama salt flat, in the Atacama desert of northern Chile
EditorialFILE PHOTO: A worker from BHP Billiton's Escondida, the world's biggest copper mine, is pictured inside a copper cathodes plant in Antofagasta
EditorialFILE PHOTO: A train loaded with copper cathodes travels along a rail line inside the Chuquicamata copper mine, which is owned by Chile's state-run copper producer Codelco