* Carbon dioxide (CO2): This is the source of carbon atoms used to build sugars and other organic molecules.

* Water (H2O): Water provides the hydrogen atoms for sugar production and is also used in the light-dependent reactions of photosynthesis.

* Light energy: This is the energy source that drives the process of photosynthesis, enabling the conversion of carbon dioxide and water into sugar.

These raw materials are combined in the presence of chlorophyll, a green pigment found in plants, to produce glucose (sugar) and oxygen as byproducts.