Head of the UN Climate Change Secretariat Yvo de Boer (L) poses next to Ben Margolis during a performance 'tck tck tck' of 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]