U.S. energy-related CO2 emissions up 1% in 2014 as buildings, transport energy use rises

U.S. energy-related carbon dioxide (CO2) emissions were 5,406 million metric tons (MMmt) in 2014, 1% (51 MMmt) above their 2013 level. Energy-related emissions also increased in 2013, but because of declines in earlier years, the 2014 emissions were still roughly 10% below their 2005 level.