Nitrogen and Oxygen. I can only assume by the wording of you question that you are either an astronaut, on a ventilator or reside on some crazy distant planet.
Nitrogen & oxygen
There are many gases in the atmosphere. The two most common gases found in the atmosphere however, are nitrogen and oxygen.
Nitrogen and oxygen, respectively, are the two most abundant gases in the earth's atmosphere.
smoke
These gases are hydrogen and helium.
oxygen and nitrogen
Nitrogen and Oxygen
Nitrogen and Oxygen
Nitrogen & Oxygen.
Nitrogen (78%) and oxygen (21%) are the two most common gases in the atmosphere.
Nitrogen & Oxygen.
hydrogen and nitrogen (I think)
Nitrogen and Oxygen are the most common gases in the atmosphere.