Cigarette Smoke In An Abstract Dance. Stock Image

Smoke is a collection of airborne particulates and gases emitted when a material undergoes combustion or pyrolysis, together with the quantity of air that is entrained or otherwise mixed into the mass. It is commonly an unwanted by-product of fires including stoves, candles, internal combustion engines, oil lamps, and fireplaces, but may also be used for pest control fumigation, communication smoke signals, defensive and offensive capabilities in the military smoke screen, cooking, or smoking. It is used in rituals where incense, sage, or resin is burned to produce a smell for spiritual or magical purposes. It can also be a flavoring agent and preservative for various foodstuffs.