Whether being used for daily cooking use, home heating, or the occasional barbecue, propane is a popular fuel. A liquid form of petroleum gas, propane is not a naturally occurring resource. It is instead refined from crude oil or natural gas, then pressurized until it becomes a gas.

Many people refer to this fuel as liquefied petroleum, or LP. It is also known as liquefied petroleum gas, or LPG.  It is odorless and colorless. It can be used to power homes, businesses, vehicles, and emergency backup generators.

On its own, propane is considered nontoxic.  A fuel with a high octane rating, it is considered to be safe around water, soil, and other resources. For this reason, the gas is often used in portable stoves, torches, BBQ grills, and other outdoor equipment.

Propane is used all across the globe by millions of people in the residential, commercial, and industrial sectors. It is typically stored in a tank, from which it can be easily dispensed and refilled. Residential tanks may fuel a whole home, or only one energy source in a home, such as the stove. Some people prefer to use propane in their homes in order to maintain power during electrical outages.

Molecularly, the gas is made up of eight hydrogen molecules and three carbon molecules. When in liquid form, the boiling point of this fuel source occurs at negative 44 degrees Fahrenheit (seven degrees Celsius). Existing at a typical negative 50 degrees Fahrenheit (10 degrees Celsius), liquid propane is dangerously cold and should not come into contact with human skin. 

Though considered a fairly safe and efficient fuel, propane is a petroleum product. The gas is a nonrenewable resource, created from fossil fuels over millions of years. Humans cannot replace this liquid fuel; hence, dependency on it, like dependency on other nonrenewable fuels, may have to be replaced by alternative fuel sources.

Several dangers surrounding the fuel use also exist. Consisting of more than 25 times the energy of natural gas, propane can cause severe damage in the case of a ruptured tank. Such occurrences can be deadly, resulting in massive destruction and whole property loss. Gas leaks can also create explosions or fires. The energy source can also produce carbon monoxide, a toxic gas that is listed as one of the most common causes of air poisoning across the globe.