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Frequently Asked Questions

What are the greenhouse gas and air pollutant emissions factors for fuels and electricity?

The U.S. Energy Information Administration (EIA) publishes emission factors (or coefficients) for the amounts of certain gases that are released when fuels are burned and for when electricity is generated. EIA publishes factors for carbon dioxide (CO2), sulfur dioxide (SO2), and nitrogen oxides (NOx). CO2 is a greenhouse gas. SO2 and NOx are not greenhouse gases, but they are criteria pollutants regulated by the U.S. Environmental Protection Agency (EPA).

Factors for the combustion of fossil fuels:

Factors for electricity generation:

EPA is a source for emission factors for greenhouse gases and other emissions factors.

Learn more:
How much carbon dioxide is produced per kilowatthour when generating electricity with fossil fuels?

Last updated: February 6, 2019

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