In order to prevent the global warming by taking hydrogen out of gases such as nitrogen, carbon dioxide, etc., a reactor 70 made of stainless steel is heated, at a temperature above 500° C., at a bottom portion where alkaline metal such as Li, Na, Ka, etc. is accommodated to be melted so that fine particles fly out to a plasma space 74 formed above the alkaline metal and having a function to amplify energy by the heat-oscillation of metal, and the first electromagnetic waves are emitted from a reactor wall to generate the second electromagnetic waves having an amplified energy in the plasma space, and further the second electromagnetic waves separate protons of nitrogen gas, carbon dioxide gas, etc. to produce hydrogen.