Ancient carbon ‘burps’ caused ocean oxygen crashes — and we’re repeating the mistake

ScienceDaily
Jun 24, 2025, 10:38 am388 ptsTop
Over 300 million years ago, Earth experienced powerful bursts of carbon dioxide from natural sources—like massive volcanic eruptions—that triggered dramatic drops in ocean oxygen levels. These ancient "carbon burps" led to dangerous periods of ocean anoxia, which stalled marine biodiversity and potentially…

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