| http://www.w3.org/ns/prov#value | - He properly praises John Todd for his work on living machines which led to many breakthroughs with ideas for things like bioshelters, water purification based on living machines, and other concepts which are used in the book, The Vertical Farm. http://toddecological.com/eco-machines/ I distinctly remember reading about a multistory bioshelter farm design for cities in the book Bioshelters, Ocean A
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