A huge plunge in oxygen levels will wipe out most life on Earth in around a billion years' time, scientists warn. It means the planet would return to an inhospitable methane-rich environment comparable to that of the early Earth.
US and Japanese researchers predicted how our planet's atmosphere will change in light of several processes related to biology, geology and climate.
They found rising solar brightness will affect surface temperatures and photosynthesis and cause rapid atmospheric deoxygenation.
In their paper, published in the journal Nature Geoscience, the researchers wrote: " We find that future deoxygenation is an inevitable consequence of increasing solar fluxes." As the sun brightens, surface temperatures will rise and
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