What are the four uses of fuel?

The four main uses of fuel include transportation, power generation, industrial production, and household use. In the field of transportation, fuels such as gasoline, diesel, and aviation kerosene power various means of transport like private cars, heavy trucks, and airplanes respectively, supporting daily travel and logistics transportation. For power generation, fuels like coal and natural gas are converted into electrical energy through the combustion process in thermal power plants, meeting the electricity needs of social production and daily life. In industrial production, industries such as steel and cement rely on the high-temperature environment provided by fuel to complete key processes like smelting and firing, ensuring the production of industrial goods. In household scenarios, fuels like natural gas and liquefied petroleum gas are commonly used for daily needs such as cooking and heating, enhancing living convenience. Additionally, fuel also has specialized applications in fields such as aerospace and military. For example, high-purity coal-based rocket propellant can serve as the power source for launch vehicles, though such uses belong to more specialized domains.