With climate at 'breaking point', leaders urge breakthrough in Paris

By Bruce Wallace and Alister Doyle PARIS (Reuters) - World leaders launched an ambitious attempt on Monday to hold back rising temperatures, with the United States and China leading calls for the climate summit in Paris to mark a decisive turn in the fight against global warming. In a series of opening addresses to the U.N. talks, heads of state and government exhorted each other to find common cause in two weeks of bargaining to steer the global economy away from its dependence on fossil fuels.