NOVELTY - The method comprises inputting a first gas such as steam to a catalytic converter section heated by a laser beam from a flowing gas laser (310) to produce a first component of a fuel gas, inputting a second gas such as carbon dioxide to the catalytic converter section heated by the laser beam to produce a second component of a fuel gas, mixing the first component of the fuel gas with the second component of the fuel gas to produce a fuel gas, and supplying a portion of the produced fuel gas to a chamber of an internal combustion engine (340). The second gas is a combustion waste product.    USE - The method is useful for producing fuel for combustion in a chamber of an internal combustion engine, which is useful in motor vehicles.    ADVANTAGE - The method is capable of simply and efficiently producing the fuel thus preventing the release of harmful carbon dioxide into the atmosphere by the engine.    DETAILED DESCRIPTION - The method comprises inputting a first gas such as steam to a catalytic converter section heated by a laser beam from a flowing gas laser (310) to produce a first component of a fuel gas, inputting a second gas such as carbon dioxide to the catalytic converter section heated by the laser beam to produce a second component of a fuel gas, mixing the first component of the fuel gas with the second component of the fuel gas to produce a fuel gas, and supplying a portion of the produced fuel gas to a combustion chamber of an internal combustion engine (340). The second gas is a combustion waste product exhausted from the internal combustion engine and different from the first gas. The portion of the combustion waste product from the internal combustion engine is additionally provided to the flowing gas laser to create the laser beam. The catalytic converter section includes single catalytic converter elements that receive both the first gas and the second gas. The catalytic converter elements are heated by the laser beam. The second gas is provided to one catalytic converter element including carbon as a catalyzing agent and the first gas is provided to another catalytic converter element including a catalyst to produce the fuel gas methane. The method further includes producing the third gas by processing air, and mixing the third gas with some of the fuel gas and combusting the mixture to produce the first and second gases. The mixing step is performed in the catalytic converter heated by the laser beam. An INDEPENDENT CLAIM is included for a device for producing a fuel gas.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a fuel gas production system.    Flowing gas laser (310)    Air separator (320)    Fuel mixer (330)    Internal combustion engine (340)    Valve. (390)