London could soon be saving a latte of carbon emmissions thanks to Shell who have started a collaboration with bio-bean to power a number of London buses with biofuel made from waste coffee grounds.

Bio-bean already has its B20 coffee oil-based biofuel which can be used for buses and some other diesel vehicles without need for modification. They say it provides a cleaner, more sustainable energy solution for transport across the city.

On average, a Londoner will drink 2.3 cups of coffee a day which produces more than 200,000 tonnes of waste a year which, instead of fueling public transport, would end up in landfill emitting millions of kilogrammes of carbon dioxide!