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People make the "Pray for Paris" sign along with the slogan "100 percent renewable" near the Eiffel Tower in Paris on December 6, 2015 on the sidelines of the COP21 climate change conference. / AFP / MARTIN BUREAU (Photo credit should read MARTIN BUREAU/AFP/Getty Images)

People make the "Pray for Paris" sign along with the slogan "100 percent renewable" near the Eiffel Tower in Paris on December 6, 2015 on the sidelines of the COP21 climate change conference. / AFP / MARTIN BUREAU        (Photo credit should read MARTIN BUREAU/AFP/Getty Images)