The splendor of fire

Fire is the thermal and light energy released during a chemical reaction that is accompanied by oxidation (combustion in particular). However, some of the more slowly oxidation processes such as rust and digestion do not result in fires. Depending on the burning material and external pollutants, the color and strength of the flame may change and a plasma may be formed depending on the ionization of its constituent gases at sufficient temperature. Fire in most of its forms can be a cause of fire, and it also has the potential to cause physical damage through burning.