Gas, often referred to as fuel, is a substance used to produce energy. It is commonly derived from fossil fuels, such as natural gas, which is primarily composed of methane. Gas is widely used for heating, cooking, and powering vehicles, making it an essential part of modern life. In addition to natural gas, there are other types of gas fuels, including propane and butane. These gases are stored in pressurized tanks and are often used in outdoor grills and portable heaters. Gas fuels are favored for their efficiency and convenience, providing a reliable energy source for various applications.