Laura Bly
Source: USA Today
March 14, 2008

Half Moon Caye Natural Monument, Belize -- Troubles at the Western Hemisphere's largest barrier reef, like those at other "underwater rain forests" scattered across the globe, run deep. A potent mix of coastal development, tourism, overfishing, pollution and climate change has damaged an estimated 40% of the Belize reef system, a UNESCO World Heritage Site that attracts more than a third of Belize's 850,000 annual visitors.

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