Live coral coverage on Caribbean reefs has dropped significantly since the 1970s, according to the International Union for Conservation of Nature. "The Caribbean, as a whole region, seems to be in a very poor state," said Chris Perry, a geography professor at the University of Exeter who has studied the area. Some conservationists are attempting to revive the reefs by "seeding" them with fast-growing coral specimens, but others are skeptical about the effectiveness of the practice.

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