20 years ago on 11 December 1997 the Kyoto Protocl was signed, committing countries to reduce greenhouse gas emissions
{"Image ImageDescription": "KYOTO, JAPAN - DECEMBER 11:    Chairman Raul Estrada (L) and Japanese Environmental Agency chief Hiroshi Oki shake hands as the Kyoto Protocol is adopted at the U.N. Climate Change conference (COP3) at Kyoto International Conference Center on December 11, 1997 in Kyoto, Japan. (Photo by The Asahi Shimbun via Getty Images)", "Image Copyright": "2017 The Asahi Shimbun"}