Dark oxygen made by deep sea 'batteries'

Until this discovery, it was believed that oxygen could not be produced without sunlight Scientists have discovered “dark oxygen” being produced in the deep ocean, apparently by lumps of metal on the seafloor. About half the oxygen we breathe comes from the ocean. But, before this discovery, it was understood that it was made by marine plants photosynthesising - something that requires sunlight. H

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dark oxygen（暗黒酸素）についての記事　鉱石が生成してると