Photosynthesis??

 So, what has photosynthesis got to do with energy?

In the process of photosynthesis, the molecules of chlorophyll contained in the chloroplasts absorb the light energy from the sun. This process allows the plants to use the energy from the sun to change water and carbon dioxide into a sugar called glucose. Glucose is a chemical energy. The plants use glucose for energy and to create other substances like cellulose and starch. Plants store their carbohydrates in long polysaccharides chains called starch. These large polysaccharides contain many chemical bonds and therefore store a lot of chemical energy. The glucose produced by photosynthesis is an integral part of the food chain because a great deal of energy is stored in the chemical bonds in the glucose molecule, and this energy can be released during digestion and chemical processing by other organisms.