Photosynthesis is the process by which plants and other organisms use sunlight, carbon dioxide, and water to produce glucose and oxygen. It is an autotrophic process that begins ecological food webs and supports all life. Experiments have shown that plants are able to produce carbohydrates from just carbon dioxide, water, and light energy through photosynthesis. The chemical equation for photosynthesis shows that wood, bark, and roots are produced from water and carbon dioxide.