The desert is will known for there wind which happens to be AIR ... So air not what you have t worry about ... its the lack of water the heat and the freezing cold at night ...
World wide, including deserts, the oxygen level of the atmosphere is about 20.95% by volume.
They get the oxygen from the air they breath.
I believe the desert gets oxygen from Cacti. Also from the rest of the planet. Oxygen is all around the planet. Winds carry the wind through the atmosphere to all parts of it, plants and other desert shrubs including cacti help to give the desert it's own form of localized oxygen.
The oxygen and carbon dioxide level is about the same as one would find out of the desert.
The Mojave is the largest desert in California.
they use their lungs to breath
yes
Mojave Desert Sonoran Desert (aka Colorado Desert) Great Basin Desert
There are very few plants in the Atacama so it produces next to no oxygen.
It is the driest desert in all of South America
The most important is the oxygen.
No it is not a desert. It is actually the oxygen and radiation that causes the surface and atmosphere to turn red. Basically Mars is a dead planet.