CO2 is causing earth to warm up, and it also acidifying ocean.
In 2030, ocean's acidity will become 450 ppmv. Today's CO2 level in ocean is 387 ppmv.
We have to go back 15 million years to find time when CO2 level is 450 ppmv.
The rapid change is why sea life is not adopting to the change.
Coral's growth bands can tell us ancient sea temperatures.
Calcium carbonate is more soluble in acidic fluid. Sea life, therefore, have to spend more energy to maintain body.
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