How do plants produce sugar

What a plant needs to live ...
The process of human breathing is comparable to the breathing of a plant. You inhale oxygen and exhale carbon dioxide. Carbon dioxide is a colorless and odorless gas.
You now know that the leaf has stomata that function like valves.
These stomata not only give off water, but also absorb carbon dioxide that is present in the air (your exhalation).
Plants don't breathe oxygen like you do, they breathe carbon dioxide. If this gas gets into the leaves, it comes into contact with the water there.
Then the following happens: In the leaves, the plant converts carbon dioxide and water into sugar (fructose) and starch. This conversion is called photosynthesis.The plant needs sugar and starch to live.
Fruits (sugar) and tubers (starch) serve as storage locations for these substances.
Therefore, fruit tastes sweet like sugar and potatoes are more floury. Starch and sugar can only be formed if there is sufficient light (sun) and green leaves (chlorophyll). The leaf green gives the leaves their green color. When the plant produces starch and sugar, it creates oxygen. The plant itself does not need this oxygen. Therefore, it releases it back into the air through the stomata in the leaves. A tree has many leaves and can produce a lot of oxygen.Plants need the oxygen you breathe out (carbon dioxide) to live and give you back the fresh oxygen you need to live. So you see that the plant world needs us to live and we need the plant world.