Now, poo powered robot to cut energy costs at sewage plants
Scientists in Bristol have created a new robot, which uses an unusual source of power - human poo, to help bring down energy costs.
The EcoBotIII robot feeds off sewage and turns energy from the nutrient rich waste into electricity, the BBC reported.
The robot is made of batteries that produce electricity, trays to hold the waste and even a fly trapping hat!
The Bristol Robotics Laboratory, who worked on the project, said it was the first time scientists had developed this type of robot.
The laboratory worked with Wessex Water, a water and sewerage company.
Dr Julian Dennis, who came up with the idea, said that treating waste consumes loads of energy at the moment, which can be expensive.
But if there's a way of making EcoBotIII work on a bigger scale then sewage plants could run on electricity they make from the waste they're already treating.