The Environmental Protection Agency released a final rule December 20 that specifies which materials may be considered fuel as opposed to solid wastes when burned in boilers or solid waste incinerators. In particular the new rule indicates that reinstated wood, coal refuse that has been recovered from legacy piles, scrap tires that are managed by established tire collection programs may be treated as fuels rather than wastes. The agency also revised its definitions of “clean cellulosic biomass,” “contaminants,” established tire collection programs,” and “reinstated wood”. The new rule will come into effect 60 days after it is published in the Federal Register.