http://permaculture.greencommunityinfo.com/uncategorized/lead-acid-batteries-deserve-bigger-role-in-hybrid-vehicles-doe-run-ceo-tells-international-lead-conference/ The term permaculture initially meant "permanent agriculture" but this was quickly expanded to also stand for "permanent culture" Fri, 10 Sep 2010 22:54:08 +0000 http://wordpress.org/?v=2.5.1