FILE PHOTO: A truck loaded with ore is seen in a mill inside the Codelco El Teniente copper mine, the world’s largest underground copper mine during an industry tour group near Machali area, Rancagua, Chile October 15, 2020. REUTERS/Fabian Cambero/File Photo
FILE PHOTO: The Codelco El Teniente copper mine, the world’s
FILE PHOTO: The Codelco El Teniente copper mine, the world's largest underground copper mine is shown near Rancagua