Reuters: Governments took a step towards greener economic growth in 2014 but will need to do far more to limit rising temperatures to a United Nations goal of two degrees Celsius (3.6 Fahrenheit), a study by accountancy firm PwC said on Monday. The carbon intensity of the world economy - the amount of greenhouse gases emitted per dollar of gross domestic product (GDP) - fell by 2.7 percent in 2014, the steepest decline since PwC started issuing reports seven years ago, it said. "The 2014 numbers suggest...