Reuters: U.S. carbon dioxide emissions from fossil fuels like coal and oil should rise this year and next as the economy recovers, making the Obama administration’s goal to cut emissions by 2020 a tougher task, the government’s top energy forecaster said on Tuesday. U.S. emissions of the main planet-warming gas should rise 1.5 percent this year to 5.53 billion tonnes as “projected improvements in the economy” boost demand for the fuels, the Energy Information Administration said in its monthly …