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.
The process that produces most of the oxygen in Earths atmosphere is photosynthesis. Plants use this process to create food.
Photosynthesis
Oxygen is produced through photosynthesis, a process where plants, algae, and some bacteria use sunlight to convert carbon dioxide and water into oxygen and glucose. This process is essential for maintaining the balance of oxygen in Earth's atmosphere.
Oxygen in the atmosphere is O2, two atoms of oxygen. Ozone, no matter where it is in the atmosphere or in a process, is O3, three atoms of oxygen.
Photosynthesis is the process that provides most of the oxygen found in the Earth's atmosphere. Through this process, plants, algae, and some bacteria convert carbon dioxide and water into glucose and oxygen using sunlight energy.
The earths atmosphere is made up of 78% nitrogen and 21% oxygen
Oxygen was added to Earth's atmosphere through the process of photosynthesis by early photosynthetic organisms like cyanobacteria. These organisms released oxygen as a byproduct, which accumulated over millions of years and eventually led to the oxygen-rich atmosphere we have today.
97%
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Oxygen first entered Earth's atmosphere through the process of photosynthesis by early cyanobacteria and other photosynthetic organisms. These organisms produced oxygen as a byproduct of their metabolic processes, gradually increasing the amount of oxygen in the atmosphere over millions of years.
Oxygen gas
Free oxygen