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Image Credit: Robyn Walker/University of Cape Town

In a first, bricks created from human urine

Students at University of Cape Town have created 'Bio-bricks' using urine, sand and bacteria through a process called microbial carbonate precipitation. Special designed fertilizer producing urinals were installed in the university to collect urine. These bricks are formed at room temperature as Urease from bacteria-colonised sand breaks down urea in urine to create calcium carbonate, which makes the sand into a brick.