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Energy¡¾related carbon dioxide (CO2) emissions decreased by 89 million metric tons(MMmt), from 5,259 MMmt in 2015 to 5,170 MMmt in 2016. Although real gross domestic product (GDP) increased 1.5% over that period, other factors contributing to energy related CO2 emissions more than offset the growth in GDP, leading to a 1.7% decline in energy-related CO2.

These factors include the following:
¡¡¡¦A decline in the carbon intensity of the energy supply (CO2/British thermal units [Btu]) of 1.7%
¡¡¡¦A 1.4% decline in energy intensity (Btu/GDP) Combining these two factors, the overall carbon intensity of the economy (CO2/GDP) declined by 3.1%. Emissions have declined in 6 out of the past 10 years, and energy¡¾related CO2 emissionsin 2016 were 823 MMmt (14%) below 2005 levels.

2017.10.5 EIA ¡ÈU.S. Energy-Related Carbon Dioxide Emissions, 2016¡É

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¡¦Since the beginning of the 2007-09 recession, coal CO2 emissions have also generally declined. The decline in coal CO2 emissions has contributed to a lower overall carbon intensity of U.S. energy consumption and kept emissions below pre-recession levels.
¡¦Natural gas CO2 emissions have increased every year since 2009. The natural gas share of electricity generation has grown as the coal share declined, partially offsetting the decline in energy-related CO2 emissions from coal. Natural gas CO2 emissions surpassed those from coal in 2016. However, because natural gas produces more energy for the same amount of emissions as coal, growth in natural gas consumption contributed to the overall 2016 decline in total emissions.

2017.10.5 EIA ¡ÈU.S. Energy-Related Carbon Dioxide Emissions, 2016¡É

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