Why is co2 used instead of air?

CO2 is used instead of air in various applications, such as in Carbonated Beverages and certain types of fire extinguishers, because it is denser and can dissolve better in liquids, providing that fizzy sensation. Additionally, CO2 is non-flammable and helps create an inert atmosphere, reducing oxidation and spoilage in food storage. Its properties make it more effective than air for specific industrial and scientific processes.