| http://www.w3.org/ns/prov#value | - This issue is devoted to the 2009 United Nations Climate Change Conference, know as the Copenhagen Summit, which sought an international agreement on climate change mitigation. digital.library.unt.edu/ark:/67531/metadc28534/ Our Planet : Sustainable Transport - on the right track Our Planet is a periodical magazine published by the United Nations Environment Programme.
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