Copper is economical

Copper in the USA: Bright Future - Glorious Past http://forums.talktaiwan.org/smf/index.php?action=profile;u=1652944 Casting Copper Cathodes http://forumsevengroup.free.fr/viewtopic.php?p=49943#49943 Copper is corrosion resistant http://benhouse.co.uk/mbchat/viewtopic.php?f=3&t=506479 What Is Copper Wire? http://n1sa.com/forum.php?mod=viewthread&tid=5345971&page=1&authorid=167661 Resistivity: Is Copper the Best Metal Conductor? http://jn.51huli.net/forum.php?mod=viewthread&tid=28807&extra= Geology and Genesis of Major Copper Deposits and Districts of the World http://the-hideout.site/Forum/showthread.php?tid=470