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