Bio bus

Bio-Bus is the UK's first bus powered entirely by human faeces and food waste.

The bus, which entered service in south west England in 2014, is powered by biomethane.

The gas is made from human sewage and food waste which is processed at a plant in Avonmouth run by GENeco, a subsidiary of Wessex Water.

[6] When compared with the diesel engines normally used to power buses, the Bio bus produces 20–30% less carbon dioxide, 80% fewer nitrogen oxides and is low in particulates.

[6] One tank of the gas will power the bus for 300 kilometres (190 mi);[7] however, the bus has to refuel at the Bristol Sewage Treatment Works which is seven miles from the city centre, which means that the bus has to make a significant journey to refuel, making it less economic to run.