And enzymes are highly efficient and limit the number of unwanted products. So, for example, in the case of carbonic and hydrates, carbonic and hydrates binds the CO2 and the water, and the CO2 is the substrate. Now, CO2 can react with water in many different ways. For example, in this particular case, we saw that we can produce sugar molecules and oxygen molecules. And these are unwanted products, at least in this particular case. So what carbonic and hydrase does is it ensures that we form only a single type of product.