Koper is nie die enigste produk nie—goud, silwer en molibdeen (’n metaal wat gebruik word om staal te versterk) word ook ontgin, tot 14000000 gram goud en meer as 110 000 000 gram silwer word per jaar as byprodukte uitgehaal!
Copper is not the only product —gold, silver, and molybdenum (a metal used to strengthen steel) are also produced, as much as 500,000 ounces [14,000,000 g] of gold and over 4,000,000 ounces [110,000,000 g] of silver as by-products in one year!jw2019 jw2019