How much CO2 does natural gas emit compared with other fossil fuels?

How much carbon dioxide is produced when different fuels are burned?

Different fuels emit different amounts of carbon dioxide (CO2) in relation to the energy they produce when burned. To analyze emissions across fuels, compare the amount of CO2 emitted per unit of energy output or heat content.

Pounds of CO2 emitted per million British thermal units (Btu) of energy for various fuels:

Coal (anthracite) 228.6 Coal (bituminous) 205.7 Coal (lignite) 215.4 Coal (subbituminous) 214.3 Diesel fuel and heating oil 161.3 Gasoline 157.2 Propane 139.0 Natural gas 117.0