Iran's head of delegation Majid Shafiepour Motlagh, China's head of delegation Xie Zhenhua and COP24 President Michal Kurtyka smile after adopting the final agreement during a closing session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 15, 2018. REUTERS/Kacper Pempel

COP24 President Michal Kurtyka shakes hands with the head of Chinese delegation Xie Zhenhua, next to Miguel Canete, EU Comissioner and Executive Secretary of the UN Framework Convention on Climate Change Patricia Espinosa, after adopting the final agreement during a closing session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 15, 2018. REUTERS/Kacper Pempel TPX IMAGES OF THE DAY

COP24 President Michal Kurtyka shakes hands with the head of Chinese delegation Xie Zhenhua, next to Miguel Canete, EU Comissioner, after adopting the final agreement during a closing session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 15, 2018. REUTERS/Kacper Pempel

COP24 President Michal Kurtyka shakes hands with the head of Chinese delegation Xie Zhenhua, next to Miguel Canete, EU Comissioner and Executive Secretary of the UN Framework Convention on Climate Change Patricia Espinosa, after adopting the final agreement during a closing session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 15, 2018. REUTERS/Kacper Pempel

COP24 President Michal Kurtyka, Executive Secretary of the UN Framework Convention on Climate Change Patricia Espinosa, Miguel Canete, EU Comissioner, and head of Chinese delegation Xie Zhenhua pose with the heads of delegations after adopting the final agreement during a closing session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 15, 2018. REUTERS/Kacper Pempel

COP24 President Michal Kurtyka and Executive Secretary of the UN Framework Convention on Climate Change Patricia Espinosa pose with the heads of delegations after adopting the final agreement during a closing session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 15, 2018. REUTERS/Kacper Pempel

COP24 President Michal Kurtyka reacts during a final session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 15, 2018. REUTERS/Kacper Pempel TPX IMAGES OF THE DAY

Miguel Canete, EU Comissioner, and head of Chinese delegation Xie Zhenhua react after adopting the final agreement during a closing session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 15, 2018. REUTERS/Kacper Pempel

COP24 President Michal Kurtyka poses for a photo after adopting the final agreement during a closing session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 15, 2018. REUTERS/Kacper Pempel

COP 24 President Michal Kurtyka and Executive Secretary of the UN Framework Convention on Climate Change Patricia Espinosa react after adopting the final agreement during a closing session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 15, 2018. REUTERS/Kacper Pempel

COP 24 President Michal Kurtyka and Executive Secretary of the UN Framework Convention on Climate Change Patricia Espinosa react after adopting the final agreement during a closing session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 15, 2018. REUTERS/Kacper Pempel

COP 24 President Michal Kurtyka and Executive Secretary of the UN Framework Convention on Climate Change Patricia Espinosa react during a final session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 15, 2018. REUTERS/Kacper Pempel

COP24 President Michal Kurtyka reacts during a final session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 15, 2018. REUTERS/Kacper Pempel

COP24 President Michal Kurtyka, Executive Secretary of the UN Framework Convention on Climate Change Patricia Espinosa, Ovais Sarmad, UN Climate Change Deputy Executive Secretary, react after adopting the final agreement during a closing session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 15, 2018. REUTERS/Kacper Pempel

COP24 President Michal Kurtyka poses for a photo during a final session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 15, 2018. REUTERS/Kacper Pempel

COP24 President Michal Kurtyka is greeted after adopting the final agreement during a closing session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 15, 2018. REUTERS/Kacper Pempel

COP24 President Michal Kurtyka reacts during a final session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 15, 2018. REUTERS/Kacper Pempel

COP24 President Michal Kurtyka reacts during a final session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 15, 2018. REUTERS/Kacper Pempel

COP24 President Michal Kurtyka reacts during a final session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 15, 2018. REUTERS/Kacper Pempel

COP24 President Michal Kurtyka speaks during a final session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 15, 2018. REUTERS/Kacper Pempel

People take part in a final session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 15, 2018. REUTERS/Kacper Pempel

COP24 President Michal Kurtyka speaks during a final session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 15, 2018. REUTERS/Kacper Pempel

COP24 President Michal Kurtyka speaks during a final session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 15, 2018. REUTERS/Kacper Pempel

COP24 President Michal Kurtyka speaks during a final session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 15, 2018. REUTERS/Kacper Pempel

A man sits on the stairs of the event center during the COP24 UN Climate Change Conference 2018 in Katowice, Poland December, 15 2018. REUTERS/Kacper Pempel

Workers dismantle an exhibition after the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 15, 2018. REUTERS/Kacper Pempel

Workers dismantle an exhibition after the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 15, 2018. REUTERS/Kacper Pempel

Workers dismantle an exhibition after the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 15, 2018. REUTERS/Kacper Pempel

Participants take part in plenary session, during the final day of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 14, 2018. REUTERS/Kacper Pempel

Participants take part in plenary session, during the final day of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 14, 2018. REUTERS/Kacper Pempel

Chilean Minister of Environment Carolina Schmidt is seen after Chile was named the host of COP25 conference, during the final day of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 14, 2018. REUTERS/Kacper Pempel

Chilean Minister of Environment Carolina Schmidt reacts after Chile was named the host of COP25 conference, during the final day of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 14, 2018. REUTERS/Kacper Pempel

Chilean Minister of Environment Carolina Schmidt reacts after Chile was named the host of COP25 conference, during the final day of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 14, 2018. REUTERS/Kacper Pempel

People leave the venue on the final day of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 14, 2018. REUTERS/Kacper Pempel

Participants sit on the stairs inside the venue, before the final session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 14, 2018. REUTERS/Kacper Pempel

U.N. Secretary General Antonio Guterres and executive secretary of the U.N. Framework Convention on Climate Change Patricia Espinosa arrive for a meeting with representatives of various NGO organisations before the final session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 14, 2018. REUTERS/Kacper Pempel

U.N. Secretary General Antonio Guterres and executive secretary of the U.N. Framework Convention on Climate Change Patricia Espinosa attend a meeting with representatives of various NGO organisations before the final session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 14, 2018. REUTERS/Kacper Pempel

U.N. Secretary General Antonio Guterres, executive secretary of the U.N. Framework Convention on Climate Change Patricia Espinosa and U.N. special envoy for the 2019 climate summit Luis Alfonso de Alba attend a meeting with representatives of various NGO organisations before the final session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 14, 2018. REUTERS/Kacper Pempel

U.N. Secretary General Antonio Guterres and executive secretary of the U.N. Framework Convention on Climate Change Patricia Espinosa attend a meeting with representatives of various NGO organisations before the final session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 14, 2018. REUTERS/Kacper Pempel

U.N. Secretary General Antonio Guterres and executive secretary of the U.N. Framework Convention on Climate Change Patricia Espinosa arrive for a meeting with representatives of various NGO organisations before the final session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 14, 2018. REUTERS/Kacper Pempel

U.N. Secretary General Antonio Guterres and executive secretary of the U.N. Framework Convention on Climate Change Patricia Espinosa arrive for a meeting with representatives of various NGO organisations before the final session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 14, 2018. REUTERS/Kacper Pempel

U.N. Secretary General Antonio Guterres and executive secretary of the U.N. Framework Convention on Climate Change Patricia Espinosa arrive for a meeting with representatives of various NGO organisations before the final session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 14, 2018. REUTERS/Kacper Pempel

Children attend a Global Campaign to Demand Climate Justice demonstration before the final session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 14, 2018. REUTERS/Kacper Pempel

People attend a Global Campaign to Demand Climate Justice demonstration before the final session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 14, 2018. REUTERS/Kacper Pempel

People attend a Global Campaign to Demand Climate Justice demonstration before the final session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 14, 2018. REUTERS/Kacper Pempel

People attend a Global Campaign to Demand Climate Justice demonstration before the final session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 14, 2018. REUTERS/Kacper Pempel

People attend a Global Campaign to Demand Climate Justice demonstration before the final session of the COP24 U.N. Climate Change Conference 2018 in Katowice, Poland, December 14, 2018. REUTERS/Kacper Pempel

A man dressed like a dinosaur is seen prior to the 'Colossal Fossil' award, offered by environmental activists from the The Climate Action Network (CAN), which is given to the country deemed to have done its best to block progress in the negotiations or in the implementation of the Paris Agreement, during the COP24 UN Climate Change Conference 2018 in Katowice, Poland December 13, 2018. REUTERS/Kacper Pempel

An activist acting as a representative of Poland receives the 'Colossal Fossil' award, offered by environmental activists from the The Climate Action Network (CAN), which is given to the country deemed to have done its best to block progress in the negotiations or in the implementation of the Paris Agreement, during the COP24 UN Climate Change Conference 2018 in Katowice, Poland December 13, 2018. REUTERS/Kacper Pempel

An activist announces the 'Colossal Fossil' award, offered by environmental activists from the The Climate Action Network (CAN), which is given to the country deemed to have done its best to block progress in the negotiations or in the implementation of the Paris Agreement, for Poland during the COP24 UN Climate Change Conference 2018 in Katowice, Poland December 13, 2018. REUTERS/Kacper Pempel

Participants take part in plenary session during COP24 UN Climate Change Conference 2018 in Katowice, Poland December 13, 2018. REUTERS/Kacper Pempel

Participants take part in plenary session during COP24 UN Climate Change Conference 2018 in Katowice, Poland December 13, 2018. REUTERS/Kacper Pempel

Participants take part in plenary session during COP24 UN Climate Change Conference 2018 in Katowice, Poland December 13, 2018. REUTERS/Kacper Pempel

Participants take part in plenary session during COP24 UN Climate Change Conference 2018 in Katowice, Poland December 13, 2018. REUTERS/Kacper Pempel

Participants take part in plenary session during COP24 UN Climate Change Conference 2018 in Katowice, Poland December 13, 2018. REUTERS/Kacper Pempel

Participants take part in plenary session during COP24 UN Climate Change Conference 2018 in Katowice, Poland December 13, 2018. REUTERS/Kacper Pempel

Participants take part in plenary session during COP24 UN Climate Change Conference 2018 in Katowice, Poland December 13, 2018. REUTERS/Kacper Pempel

Participants take part in plenary session during COP24 UN Climate Change Conference 2018 in Katowice, Poland December 13, 2018. REUTERS/Kacper Pempel

Participants take part in plenary session during COP24 UN Climate Change Conference 2018 in Katowice, Poland December 13, 2018. REUTERS/Kacper Pempel

Participants take part in plenary session during COP24 UN Climate Change Conference 2018 in Katowice, Poland December 13, 2018. REUTERS/Kacper Pempel