U.S. energy-related carbon dioxide (CO2) emissions in 2013 were 10 percent lower than 2005 levels, according to the U.S. Energy Information Administration (EIA).
Emissions in 2013 were approximately 2 percent above 2012 levels and 1.5 percent below 2011 levels. Different regions in the U.S. generally showed a downward trend of CO2 emissions, but at variable rates, the report said. The report uses Wyoming, North Dakota and West Virginia as examples of states that have higher and less efficient energy use in more sparsely populated areas and more coal-reliant electricity generation. By comparison, Nevada reduced its coal use and increased its use of geothermal and solar energy.
Between 2005 and 2011, all four Census regions – West, South, Midwest and Northeast – had declines in emissions, with the Northeast experiencing the largest reduction. At the state level, Nebraska had a 20 percent emissions increase while Nevada showed a 33 percent decrease. The Midwest, West and South regions have more diverse state-level characteristics, which contributed to slower net emissions declines compared to the Northeast.
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