How would you prove that breaking down of ozone layer and the process of photosynthesis chemical change

Dear Student,

Please see the link
https://www.askiitians.com/iit-jee-s-and-p-block-elements/ozone/


​https://www.askiitians.com/biology/photosynthesis-in-higher-plants/

Breaking down of the ozone layer is a chemical change.

The chemical equation for the destruction of the ozone layer is;

     O3 + Cl  → ClO + O2

In this process, the new substance that is oxygen is formed from original substance, ozone.

So the destruction of ozone is a chemical change.