No, we didn’t make a mistake with the title of this fact. Plants don’t convert CO2 to oxygen at all. No, I didn’t flunk school, and I didn’t make a beg typo. The statement is true and correct, even though it’s what we are taught in schools. Even searching on Google will bring up a snippet stating that oxygen is made from CO2, which is incorrect. I bet you are now wondering exactly where oxygen comes from? It comes from water, that’s right, good old fashioned H2O, not the exhaled carbon dioxide. Shall we explain?
While most people will have learned about photosynthesis and believe that carbon dioxide is converted by plants into oxygen, this isn’t exactly the case. Photosynthesis plays an important role in the process, as does CO2. The entire process of photosynthesis is a two part chemical reaction.
During part one, H2O is converted into oxygen, which requires light energy which is caught mainly by chlorophyll. The chlorophyll converts the light energy into chemical energy which take the form of electrons. This chemical energy splits two water molecules into four electrons, four protons, and two oxygen atoms, combining to produce oxygen. The carbon dioxide comes into play in the second part of the process.