* Propane: A colorless, odorless gas used as fuel for cooking and heating.

* Butane: A colorless, flammable gas used as a fuel for cooking, heating, and lighting.

* Liquefied petroleum gas (LPG): A mixture of propane and butane used as a fuel for cooking, heating, and transportation.

* Natural gas: A mixture of methane, ethane, and other gases that is used as a fuel for heating, cooking, and generating electricity.

* Ammonia: A colorless, pungent gas used as a fertilizer, refrigerant, and cleaning agent.

* Chlorine: A greenish-yellow gas used as a disinfectant, bleaching agent, and water treatment chemical.

* Sulfur dioxide: A colorless gas with a pungent odor used as a disinfectant, bleaching agent, and food preservative.

* Carbon dioxide: A colorless, odorless gas used as a fire extinguisher, refrigerant, and carbonated beverage ingredient.