Propane is a 3-carbon molecule, naturally low-carbon. It vaporizes when exposed to air with negligible effects on the ozone. Propane doesn't harm the soil and is not hazardous to drinking water or marine ecosystems. Propane is not mined like battery materials or extracted like oil. It is primarily manufactured from natural gas as a by-product of methane purification. Propane’s low carbon intensity is why it is an approved clean alternative fuel under the Clean Air Act.
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A renewable version of propane is ramping up. It's produced by converting plant and vegetable oils, waste greases, and animal fat into fuel. It delivers a high-energy conversion so BTU’s aren’t wasted, and is price competitive and carbon neutral, meaning no new carbon is added to the atmosphere when renewable propane is burned.
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The US Energy Star program gives propane a source site ratio of 1.01, compared to 3.03 for electricity from the grid. This means it takes 3.03 units of electricity to produce and deliver one unit of energy to a home, compared to only 1.01 for propane.
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