London's Public Buses to be Fueled by Coffee

British start-up bio-bean has teamed up with Shell and Argent Energy to invent a coffee-based biofuel that will soon help power London's public buses that normally run on diesel. To create the coffee oil, the company first collects used coffee grounds from factories, restaurants, and cafes, which then gets transported to a recycling facility. Afterward, the oil is extracted from the completely dried up grounds and then mixed in with other fuels to produce B20 biofuel, "which can be used in diese...