| 1 | The electrolytic copper refinery in Huelva, Spain began operations in 1970, and since 1995, has operated using ISA permanent cathode technology. | |
| 2 | A boat covered by volcanic ash sits docked on the bank of Nahuel Huapi Lake, also blanketed in volcanic ash, in Villa La Angostura in southern Argentina, Thursday June 16, 2011. |