Plant Photosynthesis
the ocean produces the most oxygen we need
Not atmospheric oxygen. Titan's atmosphere is mostly nitrogen. Most other remaining portion is methane and hydrogen.
Maybe oxygen and nitrogen
Nitrogen (78 %) and oxygen (21 %).
These gases are nitrogen, oxygen and argon.
The process that produces most of the oxygen in Earths atmosphere is photosynthesis. Plants use this process to create food.
the ocean produces the most oxygen we need
no
The Crust has the most oxygen in it
Oxygen is most commonly found in the air of Earths atmosphere.
Silicon & Oxygen (rocks).
Outside your window, and with an Internet search for "atmospheric layers". The answer is the "troposphere". That's the lowest layer where most of the air is.
The oxygen in photosynthesis is derived from water.
Nitrogen is about 70%. Oxygen runs about 28%.
nitrogen and oxygen
The evergreen states produce more oxygen.
Growing more trees as trees take in carbon dioxide and releases oxygen that we use for breathing. So. I guess Afforestation provides most of the oxygen found in the earths atmosphere.