A carbon dioxide (CO2) extinguishing system puts out fires by releasing CO2 gas into the affected area. CO2 is stored in high-pressure cylinders and, when activated, it flows through pipes and nozzles to fill the space. This gas displaces oxygen, which the fire needs to keep burning, effectively smothering the flames. CO2 systems are ideal for fires involving electrical equipment or flammable liquids because they leave no residue and act quickly. However, they require careful design to ensure proper coverage and safety, as high CO2 concentrations can be dangerous to people.