Professor Cho Jae-Weon from South Korea has developed a groundbreaking new toilet. It has the ability to transform human waste into energy and will reward users with digital currency. Every day, 500g of a person's waste can be converted into 50 liters of methane gas, generating 0.5 kWh of energy.

Users of this improved toilet will receive a type of digital currency called "gool," a meaningful name also known as "waste coin."