World's first bricks made using urine in South Africa
Students at University of Cape Town have created bricks using sand, human urine, and bacteria, claiming to be the first to do so. While regular bricks are kiln-fired at temperatures of 1,400ÂºC producing large amounts of carbon dioxide, bio-bricks do not require heat. The bricks initially smell of ammonia but the odour disappears after 48 hours, the students' supervisor said.