Before revision: Metal reserves and recycling Macro of native copper about inches (4 cm) in size The Pyhäsalmi Mine, a metal mine in Pyhäjärvi, Finland A metal recycling plant in South Carolina that has been abandoned for years During the 20th century, the variety of metals used in society grew rapidly.
After revision: Metal reserves and recycling Macro of native copper about inches (4 cm) in size The Pyhäsalmi Mine, a metal mine in Pyhäjärvi, Finland During the 20th century, the variety of metals used in society grew rapidly.