The discovery that lumps of metal on the seafloor produce oxygen raises questions over plans to mine the deep ocean.

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.

Here, at depths of 5km, where no sunlight can penetrate, the oxygen appears to be produced by naturally occurring metallic “nodules” which split seawater - H2O - into hydrogen and oxygen.

Several mining companies have plans to collect these nodules, which marine scientists fear could disrupt the newly discovered process - and damage any marine life that depends on the oxygen they make.

  • Red_October@lemmy.worldEnglish
    1·
    5 months ago

    The question posed was not what the impact would be if this source of oxygen were mined, and thus no longer contributing oxygen. The question was whether or not we could replicate this on the surface as a source of oxygen.

    The answer is that it simply is not necessary. We have plenty of oxygen, what we need are means to sink CO2, which electrolysis does not do.