Messages
- Ban Ki-moon, United Nations Secretary-General
- Irina Bokova, Director-General of the United Nations Educational, Scientific and Cultural Organization (UNESCO)
- Christina Figures, Executive Secretary of the United Nations Framework Convention on Climate Change (UNFCCC)
- Achim Steiner, Executive Director of the United Nations Environment Programme (UNEP)
- Braulio Ferreira de Souza Dias, Executive Secretary of the Convention on Biological Diversity (CBD)