The U.S. Environmental Protection Agency (EPA) issued a new rule on March 5, 2013, identifying additional fuels as meeting the Clean Air Act lifecycle greenhouse gas reduction requirements for biodiesel, biofuel or cellulosic biofuel. 78 Fed. Reg. 14,190 (1/5/13). These include (i) biofuels produced from camelina oil and energy cane; (ii) renewable gasoline produced from crop residue, slash, pre-commercial thinnings, tree residue, and annual cover crops; and (iii) cellulosic components from separated yard waste, food waste and municipal solid waste. According to the rule, cellulosic biofuel can qualify for renewable identification numbers if it is produced using only natural gas, biogas or biomass as process energy sources. These energy sources include thermochemical pyrolisis, thermochemical gasification, biochemical fermentation, and “any other process that uses biogas and/or biomass as the only process energy sources.”