How many coral reefs are still intact and how many are in decline?



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    Coral reefs are counted not by how many individual reefs there are, but by how many square miles they occupy. It is estimated that there is 110,000 squre miles of coral reef. “The latest reports state that as much as 27 percent of monitored reef formations have been lost and as much as 32 percent are at risk of being lost within the next 32 years.”

    Spalding, Mark, Corinna Ravilious, and Edmund Green. 2001. World Atlas of Coral Reefs. Berkeley, CA: University of California Press and UNEP/WCMC.

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