Ocean acidification—often dubbed the “evil twin” of climate change—occurs when oceans absorb excess carbon dioxide, triggering chemical reactions that lower seawater pH.

This process harms coral reefs and marine habitats and, in severe cases, can dissolve the shells of sea creatures.

Previously, ocean acidification hadn’t crossed its “planetary boundary”—a limit within Earth’s vital systems like climate, water, and biodiversity that, when breached, threaten planetary stability.

Scientists reported last year that six out of nine such boundaries had already been exceeded.
Ocean acidification—often dubbed the “evil twin” of climate change—occurs when oceans absorb excess carbon dioxide, triggering chemical reactions that lower seawater pH. This process harms coral reefs and marine habitats and, in severe cases, can dissolve the shells of sea creatures. Previously, ocean acidification hadn’t crossed its “planetary boundary”—a limit within Earth’s vital systems like climate, water, and biodiversity that, when breached, threaten planetary stability. Scientists reported last year that six out of nine such boundaries had already been exceeded.
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