TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Method: A portion of the hydrogen is used by an energy conversion device to supply the electric potential. The electric potential is applied across several electrodes. The separation device provides absorption of carbon dioxide in a pressurized fluid, which allows the escape of hydrogen to a collection device. The pressurized fluid is developed by a head of fluid, which produces preferential absorption of carbon dioxide. The fluid is maintained within a desirable range of operating temperatures by subsoil conditions. The separation involves pressurizing a fluid to a state, which provides preferential absorption of carbon dioxide, mixing the hydrogen and carbon dioxide with the fluid, collecting the hydrogen which remains after the preferential absorption of carbon dioxide, expanding the pressurized fluid to produce work on a motor, releasing the carbon dioxide in conjunction with the expanding process.The process involves optionally heating the fluid after absorption of carbon dioxide for increasing the work produced by a motor, which expands the pressurized fluid; and cooling the fluid before the pressurizing step. A feedback information from a gas detector is provided to a controller. If trace amounts of methane are detected, the voltage is applied between two electrodes for a recorded time period until methane production is depressed. The time until methane traces are detected again is noted by the controller and a duty cycle of applying the voltage across the electrodes for a time interval slightly longer than the time noted for depressing methane production followed by neutral electrode operation for a time period slightly less than the time noted previously for traces of methane to be detected. The duty cycle is adaptively changed to shorten the time of voltage application and to extend the time between voltage applications for purposes of minimizing methane production while maximizing hydrogen production with least application of the voltage to the electrodes. The voltage level is variably reduced to provide an adaptively adjusted control with respect to the time of the voltage application to minimize energy expenditure.Preferred Components: The heat is selected from solar energy, heat released by combustion of a portion of the hydrogen, concentrated solar energy and a combination of solar energy along with heat produced by combustion of a portion of the hydrogen. The inoculum is selected from human sewage, medium from mature anaerobic digestion of organic materials within an occasionally applied voltage, and medium from anaerobic digestion which is conducted in the presence of increased concentrations of hydrogen where the inoculum is added to organic materials selected from manure, crop wastes, and garbage for purposes of increasing the efficiency of conversion of chemical potential energy in organic materials to hydrogen.ELECTRIC POWER AND ENERGYPreferred Components: The voltage is generated by hydrogen fuel cell and/or an engine using hydrogen for fuel and a thermoelectric generator. EXAMPLE - None given.