The OECD (2009) estimates that the United States could halve its oil intensity of GDP by 2050 under various abatement scenarios (Figure 11). This reduction in oil intensity is similar to those in other OECD economies with relatively high GHG-emissions intensities of output (Canada, and the Australia and New Zealand region) and more than in European countries or Japan. The United States agreed to the Copenhagen Accord (noted by the United Nations Framework Convention on Climate Change, Conference of the Parties 15th session (COP15)) in December 2009. It commits signatories to cooperate to achieve the peaking of global and national emissions as soon as possible, recognising that the timing for peaking will be longer in developing countries than in developed countries.