The GENeco Bio-Bus runs on biomethane gas produced by human waste (and food waste, but that’s way less fun to talk about).

The Bio-Bus, which made its maiden voyage in England this month, seats up to 40 people. The bus can travel up to 186 miles on a single tank of gas that “takes the annual waste of around five people to produce,” GENeco said in a statement. The bus itself doesn’t actually smell like a bathroom, as impurities in the biofuel are removed to reduce — or almost entirely eliminate — any odors in the vehicle’s emissions.