Final answer:
Carbon dioxide production occurs least in aqueous solutions.
Step-by-step explanation:
When carbon dioxide is dissolved in water, it forms a homogeneous mixture or a solution. However, only a small amount of carbon dioxide can dissolve in water. If the atmosphere were pure carbon dioxide, the solution would contain about 0.07% carbon dioxide. In reality, the air is only about 0.03% carbon dioxide, so the amount of carbon dioxide in water is reduced accordingly.