News roundup: Energy emissions rose to record high in 2012, IEA says … S boosts outlook for U.S. government debt … Social networking dominates smartphone, tablet use

    The price of power: The International Energy Agency says the world's energy-related carbon dioxide emissions rose 1.4% in 2012 to a record high of 31.6 gigatons, even as the U.S. posted its lowest emi…

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