The United Nations climate official who has overseen talks to reach a new international climate pact announced on Thursday that he is resigning. Yvo de Boer, executive director of the U.N. Framework Convention on Climate Change (UNFCCC), said in a statement that he will leave his post in July. "Working with my colleagues at the UNFCCC Secretariat in support of the climate change negotiations has been a tremendous experience", said de Boer who has led the organization since September 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." In his statement, de Boer, a former government official in the Netherlands, said governments must work with private businesses to move forward in cutting emissions around the globe. "I have always maintained that while governments provide the necessary policy framework, the real solutions must come from business," said de Boer, who will join the consulting group KPMG as global adviser on climate and sustainability and work with several universities.