A group of Islamic experts urged the world's 1.6 billion Muslims on Tuesday to do more to fight global warming, in a new example of religious efforts to galvanise action before a UN climate summit in Paris in December. Christiana Figueres, the head of the U.N. Climate Change Secretariat, said religion was a guide for action. 

2014 was replete with conflicts, crises and contingencies that forced the United Nations to face some of its most difficult challenges in recent history.