Answer:
Increasing carbon dioxide concentration increases the rate of photosynthesis as carbon dioxide (CO2) is a limiting factor.
Explanation:
The photosynthetic rate is affected by certain factors, these can end up minimizing the potential amount of carbohydrate made by photosynthesis. For this type of biosynthesis, carbon dioxide is essential: it provides the inorganic carbon that is incorporated into carbohydrate molecules.
A decrease in the concentration of the available carbon dioxide may slow the photosynthetic rate.