FILE PHOTO: Activists protest against carbon dioxide emissions trading in front of the World Congress Centre Bonn, the site of the COP23 U.N. Climate Change Conference, in Bonn, Germany, November 17, 2017. REUTERS/Wolfgang Rattay/File Photo
FILE PHOTO: Activists protest against carbon dioxide emissions trading in front of the World Congress Centre Bonn, the site of the COP23 U.N. Climate Change Conference, in Bonn, Germany, November 17, 2017. REUTERS/Wolfgang Rattay/File Photo