Fire is a phenomena whereby a fuel is combined with an oxidizer to make a new product in a manner that releases heat (ie: an exothermic redox reaction). Rustin

Fire is a phenomena whereby a fuel is combined with an oxidizer to make a new product in a manner that releases heat (ie: an exothermic redox reaction). Rusting of metals fits that bill since heat is in fact released (just a super tiny amount and rather slowly), so it's _technically fire_ - although fire more commonly implies the rapid release of copious amounts of energy as part of the process.