What is the role of argon in air and how does it affect the composition of the atmosphere?

Argon is a noble gas found in the Earth's atmosphere. It makes up about 0.93 of the air we breathe. Argon is chemically inert, meaning it does not react with other elements. Its presence in the atmosphere helps maintain the overall composition and stability of the air. Argon does not play a significant role in the chemical reactions that occur in the atmosphere, but its presence is important for maintaining the balance of gases in the air.