Head of the UN Climate Change Secretariat Yvo de Boer (C) poses next to Ben Margolis (R) during the performance of "tck tck tck" by Global Campaign for Climate Action at the Barcelona Climate Change Talks, November 4, 2009. Time has almost run out to break deadlock on a UN climate deal supposed to be struck in Copenhagen next month, the United Nations and Denmark warned negotiators at a final preparatory meeting on Monday. [Agencies]