The innovators: how your coffee can light up your barbecue … and boiler

The Bio-bean start-up recycles waste coffee grounds into biomass fuel pellets and coals that can fire up both boilers and BBQs

While the distinctive smell of a barbecue may herald the first sign of summer, it is not often associated with energy efficiency.

That may be about to change with the launch of a new type of barbecue coal called Hot Coffees, which hails from waste coffee grounds.