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UN Secretary-General  
Message from the United Nations Secretary-General on the International Day for Biological Diversity, 22 May 2011
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UNCCD Executive Secretary  
Message from the Executive Secretary of the United Nations Convention to Combat Desertification, 22 May 2011
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UNESCO Director-General  
Message from Irina Bokova, Director-General of UNESCO on the occasion of the International Biological Diversity Day, 22 May 201
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  • United Nations
  • United Nations Environment Programme