Reuters: The number of nations backing the non-binding Copenhagen Accord for fighting global warming has risen to about 110 and includes all major greenhouse gas emitters, according to a Reuters compilation on Friday. The accord, reached at the December summit, sets a goal of limiting a rise in temperature to less than 2 degrees Celsius (3.6 F), but does not say how to achieve the goal. Rich nations also aim to give $100 billion a year in climate aid from 2020. Major emitters — led by …