* Nitrogen (N2): Approximately 78%

* Oxygen (O2): Approximately 21%

* Argon (Ar): Approximately 0.93%

* Carbon Dioxide (CO2): Approximately 0.04%

* Other gases: These include neon, helium, methane, krypton, hydrogen, and xenon, in trace amounts.

Note: This composition is not constant and can vary slightly depending on factors like altitude, location, and pollution levels.