energy efficiency project
(4) Definitions In this subsection— (A) the term “biomass”— (i) means any organic material that is available on a renewable or recurring basis, including— (I) agricultural crops; (II) trees grown for energy production; (III) wood waste and wood residues; (IV) plants (including aquatic plants and grasses); (V) residues; (VI) fibers; (VII) animal wastes and other waste materials; and (VIII) fats, oils, and greases (including recycled fats, oils, and greases); and (ii) does not include— (I) paper that is commonly recycled; or (II) unsegregated solid waste; (B) the term “energy efficiency project” means the installation or upgrading of equipment that results in a significant reduction in energy usage; and (C) the term “renewable energy system” means a system of energy derived from— (i) a wind, solar, biomass (including biodiesel), or geothermal source; or (ii) hydrogen derived from biomass or water using an energy source described in clause (i).