World leaders struggle to bridge key differences ahead of December’s U.N. climate change summit in Copenhagen. Diane and her guests discuss the prospects for an international treaty to curb greenhouse gases.


  • Janos Pasztor Director of the United Nation's Secretary-General's Climate Change Support Team.
  • Connie Hedegaard Climate and Energy Minister of Denmark
  • Juliet Eilperin Environmental reporter, Washington Post
  • Paulo Sotero Director, Brazil Institute at the Woodrow Wilson International Center for Scholars
  • Kenneth Lieberthal Director, John L. Thornton China Center, The Brookings Institution; Former senior director for Asia at the National Security Council.

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