The only factor that caused emissions to decrease in 2021 was energy intensity, which decreased CO 2 emissions by 19 MMmt. The impact of population change on emissions between 20 was positive but marginal. In 2021, the largest increases in energy-related CO 2 emissions resulted from GDP per capita (258 MMmt), and the carbon intensity of energy (84 MMmt) (Figure 3). Although record growth in emissions occurred in 2021, total emissions remained lower than peak CO 2 emissions in 2007, as well pre-pandemic emissions in 2019. Most of this increase resulted from activity across all sectors of the economy returning to pre-pandemic levels. energy-related CO 2 emission that occurred in 2020. energy-related CO 2 emissions on record, both in absolute and percentage terms, and followed the historic decline in U.S. This was the largest annual increase in U.S. energy-related CO 2 emissions increased by 7%, or 325 MMmt (Figure 1). energy-related CO 2 emissions followed an increase in economic activity Supplemental analysis, as well as a discussion of the methodology and terminology used in this report, is available in the Appendix and methodology. energy-related CO 2 emissions in this report is based on data published in both the STEO and the Monthly Energy Review (MER). We found that though there are small differences in details arising from scope and estimation method, our estimates are very close to EPA’s at aggregate levels. Environmental Protection Agency (EPA) to examine how our estimates of energy-related U.S. We were directed in the Infrastructure Investment and Jobs Act of 2021 to work with the U.S. We also provide projections of international energy-related CO 2 emissions through 2050 in our International Energy Outlook (IEO). emissions projections in the Annual Energy Outlook (AEO), which provides annual projections of energy-related CO 2 emissions by fuel source, sector, and end use, as well as projections of other elements of energy markets, through 2050. ![]() energy-related CO 2 emissions and key drivers in our monthly Short-Term Energy Outlook (STEO), which includes forecasts by fuel source over the next calendar year and our latest estimates on the effects of recent events on energy markets and energy-related CO 2 emissions. You can find a short-term forecast of U.S. energy-related CO 2 emissions are available in many of our products. Short-term forecasts and long-term projections of U.S. Many changes in energy-related CO 2 emissions between 20 were associated with the economic effects of the pandemic. The combination of conditions that raised energy-related CO 2 emissions in the United States in 2021 do not necessarily represent future trends. ![]()
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