UNESCO has officially removed the Belize Barrier Reef Reserve System, the world's second largest barrier reef, from its list of endangered world heritage sites.

It's a big deal for environmentalists and the people of Belize themselves: After all, it was voters who overwhelmingly (96%) approved measures to ban oil exploration and improve foresting regulations along the 200-mile reef.

"In the last two years, especially in the last year, the government of Belize really has made a transformational shift," said Fanny Douvere, who coordinates UNESCO's marine program.

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