title: Methane
context: The final step in the process is catalyzed by the enzyme Coenzyme-B sulfoethylthiotransferase. Methanogenesis is a form of anaerobic respiration used by organisms that occupy landfill, ruminants (for example cows or cattle), and the guts of termites.
question: Where does methane come from naturally?
answers: anaerobic respiration used by organisms that occupy landfill, ruminants (for example cows or cattle), and the guts of termites