Globally, the usage all the fossil fuels (coal, oils, gas, and you may peat), as well as the CO

dos emissions associated with the combustion of these fuels, continues to rise. Table 6-1 shows global total GHG emissions and U.S. fossil CO2 emissions over the last decade. The U.S. fossil CO2 emissions as a percent of global total GHG emissions has averaged nearly 10% during this time. Figure 6-2 shows global and U.S. CO2 emissions from fossil fuel consumption between 1960 and 2020 for the three major fossil fuels and cement manufacturing (which releases CO2 through chemical processes). The large increases in global coal emissions since 2000 can mostly be attributed to China’s increase in coal fired power plants, while in the U.S. emissions from this fuel type continue to decline due in part to the competitiveness of natural gas and renewable sources of energy. CO2 emissions from global oil combustion have remained steady over the last decade while emissions from oil in the U.S. increased in recent years due primarily to the increase from new production in basins such as the Permian and Williston and offshore regions. CO2 emissions from natural gas have increased dramatically both globally and, in the U.S., due to increases in production and demand as a replacement fuel for coal. Table 6-2 shows global and U.S. fossil CO2 emissions from the combustion of three fuel types (coal, oil, and gas) and the U.S. share of these emissions between 2010 and the year of most recent available data (2018).

6.2 Estimated Worldwide Emissions

The EIA provides long-term (2018–2050) world energy and emissions projections in its International Energy Outlook (IEO). The most recent IEO that contains CO2 emissions data is the IEO2020, released in . The IEO provides several different scenarios to forecast future energy needs and associated carbon emissions. The Reference case reflects current trends and relationships among supply, demand, and prices in the future and is a reasonable baseline case to compare with cases that include alternative assumptions about the future energy system. Similar to the AEO report, IEO provides a Reference case that assumes energy consumption will rise nearly 50% between 2018 and 2050. Worldwide coal production and consumption is assumed to be steady at about 8 billion short tons, while demand for liquid fuels (oil) increases by 20%, and natural gas consumption increases more that 40% by 2050. Global energy related CO2 emissions are projected to increase by 0.6% per year from 2018 to 2050 from about 35 billion metric tons CO2 to about 43 billion metric tons. Although aggregate CO2 emissions from the energy sector are projected to continue to rise, the carbon intensity of future energy sources (i.e., the amount of CO2 emissions produced per unit of energy used) is projected to decrease indicating that sources of energy that do not produce CO2 emissions (e.g., renewables) will comprise a larger portion of meeting future energy demands. Figure 6-3 (EIA graphs) shows both the last decade of estimated CO2 emissions from global fossil fuel combustion and the projected emissions out to 2050. The data is displayed separately for countries that are a part of the Organization of Economic Cooperation and Development (OECD), of which the U.S. is a part, and those that are not.

six.step three Yearly U.S. Emissions

The U.S. EIA provides information on energy related CO2 emissions in its Monthly Energy Review (MER). The edition of the MER shows that U.S. energy-related CO2 emissions fell by an estimated 11% from 5,140 Mt in 2019 to 4,571 Mt in 2020, largely because of reduced travel and other factors that led to less energy consumption during the COVID-19 pandemic. Emissions from coal combustion in the U.Sprised 19% of the energy consumption emissions while oil and gas consumption accounted for 45% and 36% of emissions, respectively.

Emissions Extent 2010 2011 2012 2013 2014 2015 2016 2017 2018
All over the world – Every fuels 31,582 29,459 29,806 thirty-two,371 32,389 32,366 thirty two,375 thirty two,837 33,513
U.S. – The fuels 5,352 5,128 4,903 5,039 5,047 4,929 cuatro,838 cuatro,761 4,921
You.S. All the Fuels Express 17.5% 16.3% 15.4% fifteen.6% 15.6% 15.2% 14.9% fourteen.5% fourteen.7%
All over the world – Coal thirteen,828 fourteen,584 fourteen,714 fifteen,020 fourteen,989 fourteen,607 fourteen,343 14,506 fourteen,766
You.S. – Coal step one,982 step 1,870 step one,648 step 1,705 step 1,699 step one,465 step one,356 step one,324 step one,270
U.S. Coal Share fourteen.3% a dozen.8% 11.2% eleven.4% 11.3% ten.0% 9.5% nine.1% 8.6%
International – Oils 10,554 10,573 ten,669 ten,838 ten,889 11,141 11,228 11,354 eleven,415
U.S. – Oils 2,060 step one,929 step one,870 step one,926 1,914 step 1,984 1,992 step one,981 2,031
You.S Oil Show 19.5% 18.2% 17.5% 17.8% 17.6% 17.8% 17.7% 17.4% 17.8%
All over the world – Gasoline six,038 six,123 6,239 6,325 six,322 six,427 six,592 6,759 eight,104
You.S. – Gas step one,287 step one,304 1,361 step 1,386 step one,412 step one,459 step one,470 step 1,437 step 1,601
You.S. Gasoline Show 21.3% 21.3% 21.8% 21.9% 22.3% 22.7% twenty two.3% 21.3% twenty two.5%