A close-up view of the power plant at the Wheelabrator Shasta Energy Company, Anderson, California - a 50 megawatt power plant. The Wheelabrator Shasta Energy Company uses three burner / boilers and steam turbines to convert residues from lumber waste and pulp paper (biomass) and agricultural residue into electricity. Use of biomass contributes to the local economy by creating jobs, ensuring domestic energy supplies, and providing an efficient and cost-effective source of energy. Biomass is biological material derived from living, or recently living organisms. It most often refers to plants or plant-based materials which are specifically called lignocellulosic biomass. As an energy source, biomass can either be used directly via combustion to produce heat, or indirectly after converting it to various forms of biofuel. Conversion of biomass to biofuel can be achieved by different methods which are broadly classified into: thermal, chemical, and biochemical methods.