U.N. Secretary General Ban Ki-moon (C), Head of the U.N.'s Climate Change Secretariat Christiana Figueres and Polish Prime Minister Donald Tusk arrive for the Convention on Climate Change COP19 ... more 
U.N. Secretary General Ban Ki-moon (C), Head of the U.N.'s Climate Change Secretariat Christiana Figueres and Polish Prime Minister Donald Tusk arrive for the Convention on Climate Change COP19 conference at the National Stadium in Warsaw November 19, 2013. REUTERS/Kacper Pempel (POLAND - Tags: POLITICS ENVIRONMENT BUSINESS) less 
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Reuters | Photo By KACPER PEMPEL / REUTERS
Tue, Nov 19, 2013 11:02 AM EST