InsideClimate: When all the data is in, it looks like carbon dioxide emissions from the burning of fossil fuels will have gone up 2 percent in 2013 from the previous year, the U.S. Department of Energy (DOE) said on Monday. The main reason, it said, is an uptick in the use of coal for electric power. But it's also a sign of growing economic activity in general. Ever since the deep recession began in 2008, U.S. emissions of carbon dioxide had been going down. CO2 is the principal greenhouse gas that's causing...