Carbon Emissions Rose 1% in 2014
Carbon emissions in the United States rose 1 percent in 2014, mainly from an increase in transportation. The figure has been on a downward trend since 2005 but there was a slight uptick last year. The amount of emissions required to produce a unit of GDP continued to decline, as did the amount of emissions per capita. But steady increases in both population and GDP offset these improvements. The biggest increase came in transportation, which is recovering because of low oil prices. The transport sector produced 24 million metric tons more than in 2014. Increased mileage more than offset improvements in fuel economy. The commercial sector produced 19 Mmt more and the residential sector 18Mmt. The industrial sector experienced a decline of 11Mmt, mainly because of the substitution of natural gas for coal throughout the sector.