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French Foreign Affairs Minister and President-designate of COP21 Laurent Fabius (C) puts his hand over his heart after his speech while standing next to French President Francois Hollande (L) and United Nations Secretary-General Ban Ki-moon (R) at the World Climate Change Conference 2015 (COP21) in Le Bourget, on the outskirts of Paris, France, on December 12, 2015. French hosts submitted to cheers and applause on December 12 a proposed 195-nation accord aimed at curbing emissions of the heat-trapping gases that threaten to wreck Earth's climate system. / AFP / POOL / PHILIPPE WOJAZER (Photo credit should read PHILIPPE WOJAZER/AFP/Getty Images)

French Foreign Affairs Minister and President-designate of COP21 Laurent Fabius (C) puts his hand over his heart after his speech while standing next to French President Francois Hollande (L) and United Nations Secretary-General Ban Ki-moon (R) at the World Climate Change Conference 2015 (COP21) in Le Bourget, on the outskirts of Paris, France, on December 12, 2015.      
French hosts submitted to cheers and applause on December 12 a proposed 195-nation accord aimed at curbing emissions of the heat-trapping gases that threaten to wreck Earth's climate system. / AFP / POOL / PHILIPPE WOJAZER        (Photo credit should read PHILIPPE WOJAZER/AFP/Getty Images)