The glucose is used as an energy source and also as a major building block for the structure of the plant, since sugars are combined to form cellulose. Oxygen is a byproduct of photosynthesis and is released into the air. Photosynthesis also produces an energy transfer molecule called ATP that supports many synthetic reactions in the plant. Since consumers rely on food provided by photosynthesis to sustain them, this process is one of the primary processes supporting life. It also produces most of the oxygen in the air.
Producers are a direct or indirect source of food for other organisms.