* Carbon dioxide (CO2): Makes up about 95% of the atmosphere.
* Nitrogen (N2): About 2.6% of the atmosphere.
* Argon (Ar): About 1.9% of the atmosphere.
Other gases present in trace amounts include:
* Oxygen (O2)
* Carbon monoxide (CO)
* Water vapor (H2O)
* Neon (Ne)
* Krypton (Kr)
* Xenon (Xe)
* Methane (CH4)
It's important to note that the Martian atmosphere is much thinner than Earth's, with a surface pressure about 100 times lower. This makes it difficult for liquid water to exist on the surface, and contributes to the cold, dry climate of Mars.
