FILE PHOTO: A view of a niobium mining facility owned by China Molybdenum Co Ltd (CMOC) is seen in Catalao, Goias state, Brazil October 3, 2018. REUTERS/Jake Spring/File Photo
FILE PHOTO: A view of a niobium mining facility owned by China Molybdenum Co Ltd (CMOC) is seen in Catalao, Goias state, Brazil October 3, 2018. REUTERS/Jake Spring/File Photo