Dramatic drops in oceanic oxygen, known as “anoxia”, which cause mass extinctions of sea life, come to a natural end – but it takes about a million years. Scientists believe the modern ocean is “on the edge of anoxia” and say it is “critical” to limit carbon emissions to prevent this.

\"Dramatic submitted by /u/drewiepoodle to r/science
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Source: Reddit: TGIOKDI Upvoted

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