http://www.permacultureusa.org/2009/06/30/the-dam-letter/ The Permaculture Research Institute works to hasten the uptake of sustainble systems of living through establishing educational/demonstration sites worldwide Sun, 05 Sep 2010 10:21:24 +0000 http://wordpress.org/?v=2.9.2 hourly 1 http://www.permacultureusa.org/2009/06/30/the-dam-letter/comment-page-1/#comment-1014 Keith Johsnon Thu, 10 Sep 2009 22:17:49 +0000 http://www.permacultureusa.org/?p=1186#comment-1014 For another look at beavers and their ecological / hydrological effects on landscape read Toby Hemenway's Learning from the Ecological Engineers: Watershed Wisdom of the Beaver at http://www.permacultureactivist.net/articles/Beavers.htm For another look at beavers and their ecological / hydrological effects on landscape read Toby Hemenway’s Learning from the Ecological Engineers: Watershed Wisdom of the Beaver at http://www.permacultureactivist.net/articles/Beavers.htm

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