The coral reefs will be damaged by low calcium carbonate levels is 85% that is 241,655 km².
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What is coral reef?</h3>
Corel reef is defined as the massive underwater structures made of coral, which are colonial marine invertebrates. They are very important as they are the major source of food and development of new medicines.
If there is only 15% sufficient levels of calcium carbonate, that means =85% will be damaged by low levels of calcium carbonate by 2050.
Presently there are 284,300 km² of coral reefs.
When 85% are damaged, then
= 284,300 x 85%
= 241,655 km²
Thus, the coral reefs will be damaged by low calcium carbonate levels is 85% that is 241,655 km².
To learn more about coral reef, refer to the link below:
brainly.com/question/15794949
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