It’s called he Bio-Bus and it’s first test in England of a mass transit solution that runs entirely on sewage and food waste. Tour operator Bath Bus Company is using the Bio-Bus to shuttle passengers between Bristol Airport and Bath City Center. Using Bristol’s sewage treatment works to generate bio-methane gas, the company said that the 40 seat vehicle can travel up to 186 miles on a single tank of gas.

There’s no word on how the exhaust smells.

Here’s a rundown of some of the bowel-fueled buses stats:

A single passenger’s annual food and sewage waste would fuel the Bio-Bus for 37 miles.

Its combustion engine is similar in design to diesel equivalents in conventional buses.

Compressed gas is stored in dome-like tanks on the roof of the Bio-Bus.

The gas is generated through anaerobic digestion – where oxygen starved bacteria breaks down biodegradable material to produce methane-rich biogas.

To power a vehicle, the biogas undergoes “upgrading”, where carbon dioxide is removed and propane added.

Impurities are removed to produce virtually odor free emissions.

Compared to conventional diesel vehicles, up to 30% less carbon dioxide is emitted

(Photo: Wikipedia)