Spiegel: “Copenhagen was not what I had hoped for,” said Yvo de Boer about the 2009 Climate Change Conference. A climate agreement looks remote following the chaos of the Copenhagen summit and now United Nations climate chief Yvo de Boer has thrown in the towel. UN chief Ban Ki-moon is on the lookout for a suitable successor — someone who won’t be daunted by the mammoth task ahead. First things first: Yvo de Boer’s resignation as head of the UN Climate Change Secretariat has nothing to …