De Boer will step down on July 1 to join KPMG, the UN framework convention on climate change (UNFCCC) said in a statement. He has led the agency since 2006.
"It was a difficult decision to make, but I believe the time is ripe for me to take on a new challenge, working on climate and sustainability with the private sector and academia," Reuters quoted de Boer as saying.
"Copenhagen
