Emissions of carbon dioxide in the United States peaked in 2007 at 6.14 billion tons. Since then it declined, initially due to the 2008 recession but later to use of more efficient fuels (mainly natural gas instead of coal). By 2019, it had declined by 0.76 billion tons, or 12 percent, while in 2021 it had fallen another 0.37 billion tons, or 18 percent less than 2007. Some of the decline in 2021 was due to COVID, but some was due to continuing efficiencies.
Source: Our World in Data.
Over the same time period, 2007 to 2021, emissions in China grew by 4.49 billion tons, or almost four times the decline in the United States. As of 2021, China was producing almost two-and-a-half times as much carbon emissions as the United States. Much of the increase in China was due to burning of coal that we and other countries that are busy reducing their carbon footprints are exporting to China. Continue reading
