A single passenger's annual food and sewage waste can fuel the Bio-Bus for 37 miles. The bus, which emits up to 30% less carbon dioxide than conventional diesel vehicles, will shuttle people between Bristol Airport and Bath.
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Manufactured by Scania, the Bio-Bus seats 40 and runs on biomethane gas, generated through the treatment of sewage and food waste that's unfit for human consumption, according to the website of GENeco, the company behind the bus' power supply.
The word bus is short for omnibus, which means “for everyone.” Bus was first used in this sense in the 1830s, its everyone meaning referencing the fact that anyone could join the coach along its route, unlike with stagecoaches, which had to be pre-booked.