| 11. | The atoll was officially designated as a UNESCO biosphere reserve in 1977.
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| 12. | Areas in Quer�taro and Guanajuato have been declared as biosphere reserves.
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| 13. | A Congolese rainforest dominates the biosphere reserve together with savanna vegetation.
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| 14. | While the Sierra Gorda Biosphere Reserve is arguably Mexico's most successful, problems remain.
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| 15. | This zone was declared a Biosphere Reserve by UNESCO in 1981.
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| 16. | Part of the wadi is included in the Dana Biosphere Reserve.
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| 17. | In 1996 it was recognized by UNESCO as a biosphere reserve.
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| 18. | A Unesco Biosphere Reserve, the region is a major whale-watching area.
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| 19. | Since 1990 it has been a protected biosphere reserve of UNESCO.
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| 20. | The site was designated as a UNESCO biosphere reserve in 1976.
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