NOVELTY - An apparatus (10) for producing fuel gas comprises: inlet pipe (14) for delivery of a fluid; bubble generator for producing linear stream of bubbles; injector for injecting the bubbles into the fluid; and regenerative turbine pump having an inlet for receiving fluid containing bubbles, and an impeller blade defining several buckets, where the buckets receive single bubble which is collapsed to form a fuel gas. The apparatus further comprises a gas liquid separator for separating the fuel gas from the fluid; and pressure control valve (24) in the inlet pipe. The fluid is water.    USE - As an apparatus for producing fuel gas such as methane fuel gas (claimed); and for electric motor driven pump speed and pressure control.    ADVANTAGE - The apparatus reduces carbon dioxide and carbonic acid in aqueous solutions, such as seawater; permits the application for carbon dioxide conversion to fuel gas at both point sources of gas emission, such as power plants, and from environmental resources, such as seawater; and permits concentrations of carbon dioxide and water vapor of the bubbles formed in a pumped media at a pump system inlet to be both directly and indirectly controlled, at the time of formation and during evolution through the various possible bubble sizes through to collapse, as the bubbles pass from the pump inlet's low pressure zone through the pump at increasing pressure and out the discharge at a particular controlled maximum pressure.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for method of creating methane fuel gas involving producing carbon dioxide bubbles; introducing the carbon dioxide bubbles into a stream of water; delivering the stream of water with bubbles to a regenerative turbine pump having an impeller defining several buckets; collapsing the bubbles to create an ionized gas and ionized liquid mixture containing hydrogen, hydroxyl radicals and hydroxide; reacting the ionized gas and ionized liquid with carbon dioxide to produce carbon monoxide; and reacting the carbon monoxide to produce methane.    DESCRIPTION OF DRAWING(S) - The figure shows a view of the apparatus.    Apparatus (10)    Water source (12)    Inlet pipe (14)    process Water supply tank (20)    Pressure control valve (24)    Bubble generation apparatus (30)