. . . "Copper is a basic resource that can be improved by a Mine. Yield Modifiers: \n* +2 File:20xProductionBE.png Production from a Mine. \n* +1 File:20xScienceBE.png Science if city has built a Network"@en . . . "Copper (CivBE)"@en . "Copper is a basic resource that can be improved by a Mine. Yield Modifiers: \n* +2 File:20xProductionBE.png Production from a Mine. \n* +1 File:20xScienceBE.png Science if city has built a Network"@en .