French President Francois Hollande and French Foreign Affairs Minister Laurent Fabius, left, greet United Nations Secretary General Ban Ki-moon, right, for the COP21, United Nations Climate Change Conference, in Le Bourget, outside Paris, Monday, Nov. 30, 2015 (AP)
UN Climate Change Conference in Paris 2015 (Photo: Fouad Mansour )
(Photo: Fouad Mansour )
French (Photo: Fouad Mansour )
United Nations Secretary General Ban Ki-moon, accompanied by French Ecology Minister Segolene Royal (L), French Foreign Affairs Laurent Fabius (2ndL), Secretary of the UN Framework Convention on Climate change Christiana November 30, 2015. (Reuters)
French President Francois Hollande (L) and Palestinian President Mahmoud Abbas arrive for a bilateral meeting during the opening day of the World Climate Change Conference 2015 (COP21) at Le Bourget, near Paris, France, November 30, 2015. (Reuters)
French President Francois Hollande, left, greets China's President Xi Jinping as he arrives for the COP21, United Nations Climate Change Conference, in Le Bourget, outside Paris, Monday, Nov. 30, 2015. (AP )
UN Climate Change Conference in Paris 2015 (Photo: Fouad Mansour )
UN Climate Change Conference in Paris 2015 (Photo: Fouad Mansour )
UN Climate Change Conference in Paris 2015 (Photo: Fouad Mansour )
UN Climate Change Conference in Paris 2015 (Photo: Fouad Mansour )
UN Climate Change Conference in Paris 2015 (Photo: Fouad Mansour )
Change Conference in Paris 2015 (Photo: Fouad Mansour )
U.S. President Barack Obama, right, and French President Francois Hollande pay their respect at the Bataclan concert hall, one of the recent deadly Paris attack sites, after Obama arrived in the French capital to attend the World Climate Change Conference 2015 (COP21), Monday, Nov. 30, 2015 (AP)
U.S. President Barack Obama, right, French President Francois Hollande and Paris Mayor Anne Hidalgo pay their respect at the Bataclan concert hall, one of the recent deadly Paris attack sites, after Obama arrived in the French capital to attend the World Climate Change Conference 2015 (COP21), Monday, Nov. 30, 2015 (AP)
French President Francois Hollande welcomes Italy's Prime Minister Matteo Renzi as he arrives for the opening day of the World Climate Change Conference 2015 (COP21) at Le Bourget, near Paris, France, November 30, 2015. (Reuters)
French President Francois Hollande, left, greets Swiss President Simonetta Sommaruga as he arrives for the COP21, United Nations Climate Change Conference, in Le Bourget, outside Paris, Monday, Nov. 30, 2015. (AP)
Iranian Vice-President Masoumeh Ebtekar (R) is welcomed by United Nations Secretary General Ban Ki-moon (C), Executive Secretary of the UN Framework Convention on Climate Change Christiana Figueres (3rd L), French President Francois Hollande (2nd L) and French Minister for Ecology, Sustainable Development and Energy, Segolene Royal (L) upon his arrival for the opening of the UN conference on climate change COP21, on November 30, 2015 at Le Bourget, on the outskirts of the French capital Paris. More than 150 world leaders are meeting under heightened security, for the 21st Session of the Conference of the Parties to the United Nations Framework Convention on Climate Change (COP21/CMP11), also known as ìParis 2015î from November 30 to December 11. (AFP)