Pounds of CO2 emitted per million British thermal units (Btu) of energy for various fuels:<p>Coal 228.6 - 205.7<p>Diesel fuel and heating oil	161.3<p>Gasoline	157.2<p>Propane	139.0<p>Natural gas	117.0<p><a href="https:&#x2F;&#x2F;www.eia.gov&#x2F;tools&#x2F;faqs&#x2F;faq.cfm?id=73&amp;t=11" rel="nofollow">https:&#x2F;&#x2F;www.eia.gov&#x2F;tools&#x2F;faqs&#x2F;faq.cfm?id=73&amp;t=11</a>