Answer
Dion served as the Chair of the 11th Conference of the Parties (COP 11) and the 1st Meeting of the Parties to the Kyoto Protocol (CMP 1) in 2005. This was a significant international role, as the COP is the supreme decision-making body of the United Nations Framework Convention on Climate Change (UNFCCC), and the CMP is the decision-making body of the Kyoto Protocol.