Why Is Copper Mining Important to Meet the Copper Needs? http://forums.talktaiwan.org/smf/index.php?action=profile;u=1652944 Copper in History, Its Use Throughout the Human Life http://www.cycos1.free.fr/phpbb2/viewtopic.php?p=39074#39074 Manufacturing Process of Copper http://forum.persona-clinic.kz/viewtopic.php?f=4&t=523 Importance of Copper Wire http://love666.me/viewthread.php?tid=697688&page=1&authorid=857084 Rising production from copper mine http://ww.i-freego.com/viewthread.php?tid=2640827&extra= An Historical Timeline of Copper in Human Culture http://forum.nftvillage.net/showthread.php?tid=219