title: A comment on methanogenic bacteria and the primitive ecology.
abstract: The phenotype and antiquity of methanogenic bacteria suggest them to have been one of the major factors determining a dynamic balance between CO2 and CH4 in the primitive atmosphere.
mesh_terms: D001419:Bacteria; D005075:Biological Evolution; D002245:Carbon Dioxide / Q000378:metabolism*; D008697:Methane / Q000378:metabolism*; D010641:Phenotype
chemical_list: D002245:Carbon Dioxide; D008697:Methane