Which process is primarily responsible for the 'Ocean Acidification' observed alongside climate change?
Show answer and explanation
Correct answer: The absorption of excess atmospheric $CO_2$ by seawater.
When $CO_2$ dissolves in seawater, it reacts with water to form carbonic acid ($H_2CO_3$). This lowers the pH of the ocean, making it difficult for calcifying organisms like corals and shellfish to build their skeletons.
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