Trucks transport minerals inside the Codelco Chuquicamata open pit copper mine near Calama, Chile. (Photographer: Cristobal Olivares/Bloomberg)

Even the World's Biggest Miners Are Switching to Electric Vehicles

(Bloomberg) -- BHP Billiton Ltd.’s giant Olympic Dam mine in Australia’s Outback is a labyrinth of 450 kilometers of tunnels and roads -- an ideal testing ground for the industry’s burgeoning shift...

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