Photosynthesis is the process where green plants use sunlight, carbon dioxide, and water to make food and oxygen, where as respiration is the process where cells use this food to release stored energy. Sunlight produces the energy source for Photosynthesis. It uses water and carbon dioxide to make glucose. However, Cellular Respiration is the opposite of Photosynthesis. It actually breaks down the glucose, using oxygen which creates water and carbon dioxide.
