title: Was the pre-biotic atmosphere of the earth heavily reducing?
abstract: A calculation of the net oxygen released by photosynthesis, and of the possible sinks for such oxygen, shows clearly that the pre-biotic atmosphere of the earth must have been heavily reducing.
mesh_terms: D010084:Oxidation-Reduction; D010100:Oxygen; D010788:Photosynthesis
chemical_list: D010100:Oxygen