Scrubbers: These are devices that use a liquid or gas to remove pollutants from industrial emissions.

Catalytic converters: These devices are used in vehicles to convert pollutants such as carbon monoxide, nitrogen oxides, and hydrocarbons into less harmful gases.

Electrostatic precipitators: These are used to remove particulate matter from industrial emissions by charging the particles and then collecting them on an electrode.

Low-emission combustion technologies: These include technologies such as fluidized bed combustion, which burns fuel at lower temperatures and produces fewer emissions.

Gasification: This technology involves converting solid or liquid fuels into a gas, which can then be burned more cleanly.

Carbon capture and storage: This technology involves capturing carbon dioxide emissions from industrial processes and storing them underground or using them for other purposes.

Renewable energy sources: The use of renewable energy sources such as wind, solar, and hydro power can reduce the need for fossil fuels and therefore reduce air pollution.

Green transportation: Encouraging the use of public transportation, electric vehicles, and bicycles can reduce the emissions from transportation.

These are just a few examples of the technologies used to control air pollution. The most effective solution depends on the specific type of pollutant, the source of the emissions, and the local environment.