Chairman of the United Nations' Intergovernmental Panel on Climate Change (IPCC) Rajendra Pachauri addresses the high level segment of the World Climate Conference-3 (WCC-3) at the CICG in Geneva September 3, 2009.Some 1 500 policy-makers and decision-makers from more than 150 countries will interact with scientific experts to take practical steps to adapt to climate variability and change until September 4.[Xinhua/Reuters]