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Mark Shepard of Viola, Wisconsin speaks to organic farmers about his permaculture farm, his experiences and techniques in modeling agriculture after natural, 3-dimensional ecosystems using tree and shrub agroforestry, keyline water management, rotational grazing, and more. He also explains why it is imperative that we take up these techniques immediately and on a large scale in order to sequester carbon, combat climate change, stop soil erosion, deal with peak oil, improve our air, water, and wildlife habitat, all while being more resilient and financially-viable than conventional monoculture farming. If you like this video, you can get more details about Mark's methods in his excellent new book: http://www.acresusa.com/books/closeup.asp?prodid=2213&catid=27&pcid=2