Photosynthesis is a process that plants use to make food using sunlight, carbon dioxide, and water.
Just like when we cook or bake, plants need the right amount of ingredients to make their food. In this case, one of the main ingredients is carbon dioxide (CO2).
But if there's too much carbon dioxide, it can actually be bad for the plant!
So, if the carbon dioxide level goes up too high, the rate of photosynthesis will actually start to slow down. It's like trying to bake a cake with too much sugar - it might not turn out the way you want it to!
That's why it's important to make sure that plants have the right amount of carbon dioxide, just like we need the right amount of ingredients when we cook.