South Korean professor Cho Jae-weon invents toilet that turns poop into energy and pays people in digital currency. A person defecates~ 500g/day converted into

South Korean professor Cho Jae-weon invents toilet that turns poop into energy and pays people in digital currency. A person defecates~ 500g/day converted into 50 liters of methane gas which generates 0.5 kWh. Toilet users earn Ggool. Citation from https://www.reuters.com/world/asia-pacific/south-korean-toilet-turns-excrement-into-power-digital-currency-2021-07-09/ https://www.reuters.com/world/asia-pacific/south-korean-toil... >> Students can use the currency to buy goods on campus, from freshly brewed coffee to instant cup noodles, fruits and books. The students can pick up the products they want at a shop and scan a QR code to pay with Ggool.