Prokaryotes

[Abstract] Methane is an energy-dense fuel but is also a greenhouse gas 25 times more detrimental to the environment than CO₂. Methane can be produced abiotically by serpentinization, chemically by Sabatier or Fisher-Tropsh chemistry, or biotically by microbes (Berndt et al., 1996; Horita and Berndt, 1999; Dry, 2002; Wolfe, 1982; Thauer, ...