UN chief leads calls for climate action at energy forum UN Secretary General Ban Ki-moon on Monday led calls for action to combat global warming at an energy summit in Abu Dhabi. "Now is the time for action," the UN chief told participants at the annual World Future Energy Summit held in the oil-rich emirate. French Foreign Minister Laurent Fabius, who presided over sealing the historic COP 21 global climate pact in Paris last month, said rapid action is a must. IMAGES AND SOUNDBITES