Designing the Future by Jacque Fresco

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The Nature of Space and Time by Stephen Hawking and Roger Penrose

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Freedom is more than just a seven letter word by veronica of the chapman family

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Freeconomy Booklet by freeconomy.org

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 31 Οικολογικές Τρίπλες του Γιώργου Βλάσση

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Sustainable Energy by David J.C. MacKay

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