Oxygen is vital in combustion processes like the burning of fuels. All combustion reactions also are samples of redox reactions. A combustion response takes place each time a material reacts with oxygen to produce heat. A single example could be the combustion of octane, the basic principle element of gasoline: https://oxygenchambersforcancer97418.tinyblogging.com/considerations-to-know-about-oxygen-chambers-for-healing-80378961