The most common method for controlling gaseous pollutants is the addition of add-on control devices to recover or destroy a pollutant. There are four commonly used control technologies for gaseous pollutants: - Absorption, - Adsorption, - Condensation, and - Incineration (combustion) However inceneration is the most widely used technique) adopted to control the gaseous air pollutant. Incineration, also known as combustion, is most used to control the emissions of organic compounds from process industries. This control technique refers to the rapid oxidation of a substance through the combination of oxygen with a combustible material in the presence of heat.