UN Declaration Calls for as Much as $10 Trillion a Year to Meet Climate Targets

Conference participants walk through an illuminated tunnel at the UNFCCC COP27 climate conference in Sharm El Sheikh, Egypt, on Nov. 8, 2022. Sean Gallup/Getty Images

The United Nations COP27 climate plan calls on nations to spend eight to ten trillion dollars annually to invest in green energy and rapidly reduce greenhouse gas emissions.