Where does the oxygen supplied to the atmosphere by plants come from?

Plants are the main suppliers of oxygen to the atmosphere. Plants have organelles capable of photosynthesis. These organelles are called chloroplasts, which contain chlorophyll. Chlorophyll attracts energy from the sun and uses it in the process of interaction between carbon dioxide and water. Water rises from the roots, and carbon dioxide is attracted by the stomata of leaves from the air. As a result of a chemical reaction, not only organic substances are obtained for plant nutrition, but also oxygen, which is released into the atmosphere. This process is permanent.