PARIS, FRANCE - DECEMBER 11: The slogan '1.5 Degrees' is projected on the Eiffel Tower as part of the World Climate Change Conference 2015 (COP21) on December 11, 2015 in Paris, France. COP21 President Laurent Fabius unveiled the final draft text of a global climate agreement of negotiations in Paris. (Photo by Chesnot/Getty Images)

PARIS, FRANCE - DECEMBER 11:  The slogan '1.5 Degrees' is projected on the Eiffel Tower as part of the World Climate Change Conference 2015 (COP21) on December 11, 2015 in Paris, France. COP21 President Laurent Fabius unveiled the final draft text of a global climate agreement of negotiations in Paris.  (Photo by Chesnot/Getty Images)