Overview U.S. energy-related carbon dioxide emissions decreased 0.9% in 2017 Energy-related CO2 emissions decreased by 47 million metric tons (MMmt), from 5,189 MMmt in 2016 to 5,142 MMmt in 2017. Although real gross domestic product (GDP) increased 2.3% over that period, the other factors contributing to energy-related CO2 emissions listed below more than offset the growth in GDP: A 1.1% decline in the carbon intensity of the energy supply (CO2/British thermal units [Btu]) A 2.0% decline in energy intensity (Btu/GDP) A 3.1% decline in the overall carbon intensity of the economy (CO2/GDP) Emissions have declined in 7 out of the past 10 years, and energy‐related CO2 emissions in 2017 were 849 MMmt (14%) below 2005 levels. percent changemillion metric tons of CO2 Note: Unless otherwise indicated, all data in this analysis refer to the U.S. Energy Information Administration’s (EIA) August 2018 Monthly Energy Review . Because fossil fuels are […]