The gas required for burning is oxygen. Combustion, the chemical reaction that produces fire, typically requires three components, often referred to as the "fire triangle": fuel, heat, and oxygen. Oxygen supports the oxidation of the fuel, allowing it to combust and release energy in the form of heat and light. This process is crucial not only in everyday fires but also in numerous industrial applications, from engines to power generation. In environments with insufficient oxygen, combustion is incomplete, leading to smoke and potentially harmful pollutants.