This process is called photosynthesis. It is done by the plants.
Plants absorb carbon dioxide and release oxygen.
Plants produce an excess of oxygen which is released into the atmosphere. This is a product of photosynthesis.
Oxygen was released from Precambrian rocks. cynobacteria were the first organisms to produce oxygen 2.5-3 billion years ago
If you mean how does it come to be in the atmosphere, oxygen is released into the atmosphere by plants, mostly by phytoplankton in the ocean. I you mean how is oxygen created in the first place, it is the result of lighter elements being fused together in the cores of stars.
Atmosphere
Nitrogen is more in the atmosphere. Around 78% of the atmosphere is nitrogen gas and 21% is oxygen gas.
The balance of oxygen and carbon dioxide is maintained in the atmosphere by the oxygen released by plant during photosynthesis and carbon dioxide released by human ,animal's etc in the atmosphere
The oxygen in water is the oxygen that is released into the atmosphere.
Oxygen! :)
Oxygen.
CFC's are released into atmosphere. They break the ozone into oxygen molecules.
The amount of oxygen released into the atmosphere has not noticeably increased in recent years. The amount of oxygen (O2) in the atmosphere is about 21%. It is part of the earth's oxygen cycle, the main driver of which is photosynthesis. Vegetation removes carbon dioxide (CO2) from the atmosphere, releases the oxygen (O2) and stores the carbon (C).
Carbon dioxide is being released. As you breathe in you inhale fresh oxygen, but as you breathe out your body releases carbon dioxide.
Photosynthesis
It gets released into the Atmosphere.
Plants release oxygen into the atmosphere as a by-product of photosynthesis.
Plants produce an excess of oxygen which is released into the atmosphere. This is a product of photosynthesis.
It released into the atmosphere, if it isn't immeadiately used in respiration.