We remind you of our earlier post, concerning the report: "Structure and Function of Enzymes Involved in the Methanogenic Pathway Utilizing Carbon Dioxide and Molecular Hydrogen", by Shima, et.al., Germany.
Herein, through the link and following excerpt, it is revealed that a US Patent has been applied for, detailing a technology to utilize that "Methanogenic Pathway", and to do so, as we have earlier suggested to be feasible, at the sources of Carbon Dioxide emission; specifically, in this US Patent Application, at power plants utilizing fossil fuel.