The two substances made in photosynthesis are glucose and oxygen. Both of these substances are necessary for feeding nearly all of the life on the planet.
Photosynthesis typically occurs in the plant's leaves within the chloroplasts. Photosynthesis requires sunlight, carbon dioxide and water to occur. This takes place in two stages, known as the light reaction and the dark reaction. In the light reaction, sunlight is converted into chemical energy in the form of ATP, NADHP and oxygen. The dark reaction uses the energy created in the light reaction, in addition to carbon dioxide, to produce sugar in the stroma.