Based on data in EIA’s Monthly Energy Review, energy-related carbon dioxide (CO2) emissions decreased by 11% in the United States in 2020 primarily because of the effects of the COVID-19 pandemic and related restrictions. U.S. energy-related CO2 emissions fell in every end-use sector for the first time since 2012.
Within the U.S. power sector, emissions from coal declined the most, at 19%. Natural gas-related CO2 rose by 3%. In 2020, as fossil fuel generation declined, generation from renewables continued to grow. Generation from wind and solar together increased by 17% in 2020. This shift in the United States toward renewable generation sources helped to lower the carbon emissions per unit of electricity generated, also known as carbon intensity. In our end-use sector CO2 emissions series, emissions from the power sector are distributed to each sector based on the sector’s share of total electricity consumption.
— Read on www.eia.gov/todayinenergy/detail.php