copper mine and smelting complex of zijin bor copper in bor, serbia

copper mine smelting complex zijin bor serbia alloy barren chimney city cliff country deposits eastern ecology energy environment environmental fabric factory furnace gold industrial industry ironworks landscape melting house metallurgy minerals nature nonferrous metal plant pollution power production rare refinery rock serbian smelter smeltery smoke soil stack steam china mining may 2021 one largest mines europe owned chinese company group