A dry scrubber is an air pollution control device that removes harmful pollutants from industrial exhaust gases without using water. Instead of relying on liquid solutions, it uses solid materials, such as activated carbon or lime, to capture and neutralize contaminants like sulfur dioxide and volatile organic compounds. This technology is often used in power plants and manufacturing facilities to meet environmental regulations. The process involves passing the exhaust gas through a bed of dry absorbent materials, which chemically react with the pollutants. Once the materials become saturated, they can be replaced or regenerated, making dry scrubbers an efficient and sustainable option for reducing air pollution.