| − | Process of obtaining energy from animal [[waste]]s. This is a type of [[biomass energy]].<ref>http://www.energy.ca.gov/glossary/glossary-a.html#a</ref> | + | Process of obtaining energy from animal [[waste]]s. This is a type of [[biomass energy]].<ref>http://www.energy.ca.gov/glossary/glossary-b.html#b</ref> |