Fuel combustion is a chemical reaction that occurs when a fuel, such as gasoline, natural gas, or coal, reacts with oxygen from the air. This process releases energy in the form of heat and light, which can be harnessed for various applications, including powering vehicles, heating homes, and generating electricity. During combustion, the fuel is transformed into different products, primarily carbon dioxide and water vapor. The efficiency of this process can vary based on factors like the type of fuel used and the conditions under which combustion occurs, such as temperature and pressure.