U.S. Secretary of State Condoleezza Rice speaks with James Connaughton (C), chairman of the Council on Environmental Quality and Yvo de Boer (R), representative of the United Nations Framework Convention on Climate Change at the Major Economies Meeting on Energy Security and Climate Change at the State Department in Washington September 27, 2007. The world's biggest greenhouse gas polluters -- including the United States and China -- sent envoys to the U.S. State Department on Thursday for discussions on climate change and what to do about it.
REUTERS/KEVIN LAMARQUE