A methane or methanol producing system is proposed in which laser beams are generated in space by excitation of sunlight, transmitted onto land or sea without loss to obtain optical energy with high efficiency, and irradiated on a hydrogen producing device to produce {HEAD ~ industrially inexpensive hydrogen} with high efficiency, thereby producing {TAIL ~ methane} or methanol 
producing
A methane or methanol producing system is proposed in which laser beams are generated in space by excitation of sunlight , transmitted onto land or sea without loss to obtain optical energy with high efficiency , and irradiated on a hydrogen producing device to produce { HEAD ~ industrially inexpensive hydrogen } with high efficiency , thereby producing { TAIL ~ methane } or methanol
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