Coffee powers more than just people, it’s also starting to power public transportation in London. Using a technique that extracts oil from waste coffee grounds, a technology firm has been able to create a biofuel that will be used to help power some of London’s famous busses starting this week. Biofuel made using waste products such as cooking oil and tallow from meat processing is already used in many of the capital’s 9,500 buses, but this is the first time a coffee-derived biofuel has been added to London’s public transport system.