Britain has long been known for its love of tea, but people in London also drink a lot of coffee. In fact, the average Londoner reportedly drinks 2.3 cups of coffee every day. And now, waste coffee grounds will be used to help fuel part of the city’s transportation system. A technology company announced on Monday that some buses will be using a biofuel that contains coffee oil. The company, Bio-bean, and its partner, Argent Energy, say they have made enough coffee oil to power one of London’s famous double-decker buses for a year.