A study by the USGS of copper recycling in the US in 2004 found that 43% of the potential copper resource was recycled equaling 30% of the nation's demand for the metal. For comparison, Arizona mines produce more than 60% of the nation's copper needs. [right, credit Freeport McMoRan]
Goonan, T.G., 2009, Copper recycling in the United States in 2004, chap. X of Sibley, S.R., Flow studies for recycling metal commodities in the United States: U.S. Geological Survey Circular 1196–X, p. X1–X30, available only at http://pubs.usgs.gov/circ/circ1196x/.