Here's how it works:
* Respiration in humans: We breathe in oxygen (O2) and use it to break down food for energy. This process releases carbon dioxide as a waste product, which we exhale.
* Photosynthesis in plants: Plants use sunlight, water (H2O), and carbon dioxide (CO2) to produce their own food (glucose) and release oxygen as a byproduct.
This exchange of gases is an essential part of the natural cycle, where plants use what humans exhale and humans use what plants produce.
