What is what kind of mixture is air?

Air is a mixture of gases that primarily consists of nitrogen (about 78%), oxygen (about 21%), and small amounts of other gases such as carbon dioxide, argon, and trace gases. Additionally, air also contains variable amounts of water vapor, dust particles, and pollutants. This mixture is essential for supporting life on Earth, as it provides the necessary gases for respiration and other biological processes. The composition of air can vary depending on factors such as location, altitude, and human activities.