The two fuels are very similar in their chemical make-up. What makes them different is the way they are transported and distributed to your home. Natural gas comes to your home by a series of pipelines. These lines are connected directly to your home. Natural gas lines are usually found in urban areas with higher population levels.
Propane is delivered to your home by truck, and kept in a tank there. When an appliance in your home needs gas, propane leaves the tanks as a vapor and travels by a pipe to the appliance. Propane is generally used in rural areas that don’t have natural gas mains.