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If we didn’t have oxygen would we adapt to the carbon dioxide?

If we didn’t have oxygen would we adapt to the carbon dioxide?
Letitia Ayres from Southampton (Aged 5-14)


One Response

  1. Even though plants use carbon dioxide and produce oxygen as part of photosynthesis, they still also use oxygen and produce carbon dioxide again when they’re respiring.

    If you could somehow remove all the oxygen from Earth’s atmosphere in an instant, then most of the plants would die as well (at least until they’d produced enough oxygen again to sustain themselves).

    For humans to do this we’d need to be able to photosynthesise, which is something none of your ancestors have done until you trace your family tree way back to the simplest life-forms in Earth’s early oceans. To develop this ability within our lifetimes simply isn’t possible (at least not without a level of biological and genetic engineering that is currently beyond our capabilities), and for an natural evolutionary change of this sort you’re probably looking at thousands of years, if not longer.

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