Copper production from Glencore fell 5% year on year in 2021 to 1.2 million mt, largely because of the previously announced disposal of the Mopani operation and lower grades at Antapaccay, which were to some extent offset by minimization of lower copper by-products from aging zinc and nickel mines, the company said in in its full year production report published Feb. 2. However, cobalt production soared year on year by 14% to 31,300 mt after Glencore began a phased restart of Mutanda in the DRC.