Electrostatic precipitators are devices used to remove particles from industrial exhaust gases. They work by charging dust and other particles as they pass through an electric field. The charged particles are then attracted to oppositely charged plates, where they collect and can be removed. These devices are commonly used in power plants, cement factories, and other industries to reduce air pollution. By capturing harmful particles, electrostatic precipitators help improve air quality and protect the environment, making them an important technology in efforts to reduce emissions.