Efficiency of Biomass EnergyCovering energy and exergy efficiencies of all main aspects of biomass energy It is widely acknowledged that the existing fossil fuels should be replaced in future by renewable energy such as biomass, solar, wind, and geothermal. At present biomass is the fourth largest energy resource in the world, after oil, gas and coal. Biomass can be converted into all major energy carriers like electricity, heat, transport fuels as well as a wide diversity of