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Visit to Yves Cochet's farm: • Visit to the post-collapse farm... Jean Philippe Valla's book on biogas: https://amzn.to/40le49I You will find my book on the basics of self-sufficiency here: Booksellers: https://www.leslibraires.fr/livre/201... Amazon: https://amzn.to/321XFyy Fnac: https://livre.fnac.com/a16291185/Bjor... ----------- contact: [email protected]