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Combustion can also be used to control emissions of hydrocarbons and other organic vapors such as chlorine, fluorine and particulate matter (soot). If a process emits volatile organic compounds such as ink fumes from a large commercial printing operation, the fumes can be destroyed or burned.
Flares dispose of intermittent or emergency releases of combustible gases from industrial sources. They are often found in refineries or chemical plants. In a flare, combustible gases are burned in a flame. They are designed to do so with minimal smoke (smoke is made up of dense amounts of soot particulates.)