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About half the world's coastlines are in the tropics and about a third of the tropical coastlines are made of coral reef. Roughly half the calcium that enters the sea each year around the world, from the north to south poles, is taken up and temporarily bound into coral reefs (Smith, 1978).
About half the world's coastlines are in the tropics and about a third of the tropical coastlines are made of coral reef. Roughly half the calcium that enters the sea each year around the world, from the north to south poles, is taken up and temporarily bound into coral reefs (Smith, 1978).
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