Not a joke. Indeed, now with technology, you can convert urine into bricks. That’s what scientists at South Africa’s University of Cape Town have done. They have developed the world’s first bio-brick grown from human urine. To create these bricks, urease enzyme producing bacteria is let loose into sand mixed with urine. The enzyme breaks down the urea in urine producing calcium carbonate through a complex chemical reaction and lo and behold you get sand cemented into any shape you want, bricks or columns. Another interesting but uniquely different example of waste recycling.