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Lessons from the chinampas: How the Aztecs recycled human nutrients for a clean, green city
Just outside Mexico City, the remnants of the Aztec’s 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.
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From pee to coffee: Recycling urine on the space station
On the International Space Station, astronauts cleanse and recycle their urine to provide drinking water, over and over.
