(Paul White | The Associated Press) U.N. Secretary-General Antonio Guterres arrives for a news conference at the COP25 summit in Madrid, Spain, Sunday, Dec. 1, 2019. This year’s international talks on tackling climate change were meant to be a walk in the park compared to previous instalments. But with scientists issuing dire warnings about the pace of global warming and the need to urgently cut greenhouse gas emissions, officials are under pressure to finalize the rules of the 2015 Paris accord and send a signal to anxious voters.