Frequently Asked Questions

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

EIA publishes emission factors (or coefficients) for three major greenhouse gases: Carbon Dioxide (CO2), Methane (CH4) and Nitrous Oxide (N20), and for the criteria air pollutants; Sulfur Dioxide (SO2) and Nitrogen Oxides (NOx), which are released when fuels are burned and when electricity is generated and used as follows:

For combustion of fossil fuels:

For electricity — as generated:

For electricity as consumed:

A source of emission factors for other substances and fuels is the U.S. Environmental Protection Agency.

Last updated: April 2, 2014

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