Britain's new poo bus

Take Part - The ‘Poo Bus’ can travel more than 186 miles on five years’ worth of one human’s waste.

No, it doesn’t smell bad.

The makers of the Bio-Bus, the first bus powered by human feces and food waste in the U.K., made sure of that before the 40-seater debuted this week.

The aptly nicknamed “poo bus” runs on sewage and food scraps that go through treatment, which removes odor-causing impurities and carbon dioxide. Propane is added in the process, and the resulting biomethane gas goes in dome-shaped tanks on the roof. The bus emits about 30 percent less carbon dioxide than a typical diesel vehicle, according to the BBC.