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PARIS, FRANCE - NOVEMBER 30: (L-R) Executive Secretary of the United Nations Christiana Figueres, U.N General secretary, Banki Moon, French President Francois Hollande, French Prime Minster, Manuel Vals, French Minister Of Foreign affairs, Laurent Fabius and King Mohamed VI of Morroco attend the Family photo of the Cop 21 on November 30, 2015 in Paris, France. World leaders are meeting in Paris for the start of COP21, the two-week UN climate change summit, attempting to agree on an international deal to curb greenhouse gas emissions. (Photo by Pascal Le Segretain/Getty Images)

PARIS, FRANCE - NOVEMBER 30:  (L-R)  Executive Secretary of the United Nations Christiana Figueres, U.N General secretary, Banki Moon, French President Francois Hollande, French Prime Minster, Manuel Vals, French Minister Of Foreign affairs, Laurent Fabius and King Mohamed VI of Morroco attend the Family photo of the Cop 21 on November 30, 2015 in Paris, France.  World leaders are meeting in Paris for the start of COP21, the two-week UN climate change summit, attempting to agree on an international deal to curb greenhouse gas emissions.  (Photo by Pascal Le Segretain/Getty Images)