"I confess to being confused but possibly much enlightened. Permaculture to me has always meant an enlightened form of gardening/farming. Looking up the Oxford dictionary confirmed this; the word is derived from permanent + agriculture. However Toby seems to be suggesting a new origin for the word; permanent+culture, i.e. a more permanent way for society to live in our changing environment. If this is the case, it's a marvellous idea, the downside being that I'll have to have my Websters dictionary beside the Oxford, for quick reference."