Gas fuels are energy sources in gaseous form, commonly used for heating, cooking, and electricity generation. The most prevalent types include natural gas, propane, and butane. These fuels are favored for their efficiency and lower emissions compared to solid or liquid fuels. Natural gas, primarily composed of methane, is often delivered through pipelines and is widely used in homes and industries. Propane and butane, known as liquefied petroleum gases (LPG), are stored in tanks and are popular for outdoor cooking and heating. Overall, gas fuels play a significant role in modern energy consumption.