http://permaculture.org.au/2009/04/24/could-food-shortages-bring-down-civilization/ Permaculture News, Commentary and Worldwide Projects. Thu, 09 Feb 2012 08:48:25 +0000 http://wordpress.org/?v=2.9.2 hourly 1 http://permaculture.org.au/2009/04/24/could-food-shortages-bring-down-civilization/#comment-31275 Isaac Fri, 24 Apr 2009 02:22:35 +0000 http://permaculture.org.au/?p=1349#comment-31275 There is an excellent powerpoint presentation that is free to download that summarizes the main points of the book. Great for teachers. There is an excellent powerpoint presentation that is free to download that summarizes the main points of the book. Great for teachers.

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