Carbon-negative energy source powers homes on walnut shells Oct 20, 2013 5:52:39 GMT -8 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by bot on Oct 20, 2013 5:52:39 GMT -8 Carbon-negative energy source powers homes on walnut shells pop entertainment portal www.totallyexcellent.infoTRAVEL information portal www.1t23.comfollow twitter www.twitter.com/ret_weet