FILE PHOTO: A mining truck is seen during an industry tour group inside the Codelco El Teniente copper mine, the world’s largest underground copper mine near Machali area, Rancagua, Chile October 15, 2020. REUTERS/Fabian Cambero
FILE PHOTO: A mining truck is seen during an industry tour group inside the Codelco El Teniente copper mine, the world’s largest underground copper mine near Machali area, Rancagua, Chile October 15, 2020. REUTERS/Fabian Cambero