On the canals of Xochimilco, the remnants of the Aztec chinampas reveal a lost model of urban sustainability. Tenochtitlan, a dazzling, waste-free city, once recycled all its organic material to feed these fertile farms — a lesson in circular ecology for cities today.
Over 30 years ago, Joe Jenkins needed a better title for his book on composting human poop. He coined the term “humanure,” self-published The Humanure Handbook, and sparked a global movement promoting simple, affordable, and ecological compost toilets.
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