As of August 2007, about 2.1% of energy used in the United States came from wood. This could potentially increase to about 10.0% of U.S. energy use. What are the sources of wood-based energy, and how can wood be used to make energy?
Follow this link to learn more: http://www.fpl.fs.fed.us/documnts/tmu/biomass_energy/sources-uses-of-wood-for-energy.pdf