A truck travels to a depth of 516 metres below the surface to collect ore at the Chibuluma copper mine in the Zambian copperbelt region, File. REUTERS/Rogan Ward/File Photo
A truck travels to a depth of 516 metres below the surface to collect ore at the Chibuluma copper mine in the Zambian copperbelt region, File. REUTERS/Rogan Ward/File Photo