It's a new form of power that could become a valuable source of renewable energy. Thames Water is investing £250m in a plant that will process human waste.
There's no shortage of supply and, if it works, the plant in Oxford will generate enough electricty to supply 37,000 homes. Kate Bunkall takes up the story.
More top news
A mobile DNA screening unit has been set up in a village where detectives are working to find a grandmother's killer.
Tuesday night's weather for the east of the region
Tuesday night's weather for the west of the region