In December, climate scientists, policy makers and other representatives of 192 nations will convene at the United Nations Climate Change Conference in Copenhagen. In advance of that meeting, Science News earth sciences writer Sid Perkins spoke with Richard A. Bradley, head of the Energy Efficiency and Environment Division of the International Energy Agency in Paris. An intergovernmental organization that counts 28 industrialized nations as members, the IEA analyzes and facilitates global energy policy. What is the purpose of December’s United Nations meeting? The Kyoto Protocol, which p... (p. 32)