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.
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Manali has Friday morning's forecast for the west of the Meridian region.
Manali has Friday morning's forecast for the east of the Meridian region.
The schools attended by two teenagers killed with their parents when their seaplane crashed in Canada have paid tribute to the pair.