Which of the techniques is used in industry to control particulate pollutants? Fabric filter Combustion Adsorption by solid None of the above

All three techniques mentioned - Fabric filter, Combustion, and Adsorption by solid - are used in the industry to control particulate pollutants.

1. Fabric Filter: Also known as Baghouses, these are air pollution control devices that remove particulates out of air or gas released from commercial processes or combustion for electricity generation. They are one of the most efficient and cost effective types of dust collectors available.

2. Combustion: This is a high-temperature process used to control VOCs, gaseous emissions, and particulate matter from industrial operations. Combustion destroys particulate pollutants by oxidizing them into harmless products such as CO2 and water vapor.

3. Adsorption by Solid: This is a method where pollutants are captured on or in a solid material. It is commonly used to remove gases that contain pollutants. The pollutants are attracted to the surface of the solid, where they adhere and are thus removed from the air stream.

So, the answer is not "None of the above" because all the mentioned techniques are used in the industry to control particulate pollutants.