When carbon is emitted into the atmosphere, about a quarter of it is absorbed by the earth's oceans. As the oceans serve as a massive "sink" for carbon, there are changes to the water's pH—a measure of how acidic or basic water is. As oceans absorb carbon, their water becomes more acidic, a process called ocean acidification (OA). For years, researchers have worked to understand what effect this could have on marine life.

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