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.
Related: The innovators: micro micro-breweries causing a froth