▎ 摘　　要

NOVELTY - Reduction of carbon dioxide involves adsorbing carbon dioxide on an adsorbent to impart polarity to the carbon dioxide, and reducing the carbon dioxide by irradiating microwaves on the adsorbed carbon dioxide. USE - Reduction of carbon dioxide into carbon monoxide, methane, ethane, propane, butane, pentane, hexane, heptane, ethylene, acetylene, propene, propyne, butene, 1-butyne, pentene, pentyne, cyclohexane, cyclohexene, cycloheptene, 2-heptyne, methylamine, ethylamine, propylamine, and butylamine (all claimed). ADVANTAGE - The method enables reduction of carbon dioxide with excellent efficiency, and suppressed deterioration when irradiated with visible light.