The United Nations proclaimed 22 May International Day for Biological Diversity (IBD) to increase understanding and awareness of biodiversity issues and to commemorate the adoption of the Convention on Biological Diversity.The theme for the International Day on Biological Diversity (IBD) in 2009 is invasive alien species (IAS). IAS constitute one of the greatest threats to biodiversity, and to the ecological and economic well-being of Earth and its inhabitants.
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