U.S. energy-related carbon dioxide (CO2) emissions declined by 2.8% in 2019 to 5,130 million metric tons (MMmt), according to data in the U.S. Energy Information Administration’s (EIA) Monthly Energy Review. CO2 emissions had increased by 2.9% in 2018, the only annual increase in the past five years. Because of continuing trends in how much energy the U.S economy uses and how much CO2 that energy use generates, energy-related CO2 emissions in 2019 fell more than energy consumption, which declined by 0.9% in 2019, and gross domestic product, which increased by 2.3% in 2019.