Photosynthesis When you and me eat, we find our food. When plants eat, they make their own food and energy. They make their food and energy through a process called photosynthesis. Through photosynthesis oxygen is also produced. Photosynthesis is "a process in which green plants synthesize carbohydrates from carbon dioxide and water....The reverse of this reaction provides energy for plants, for animals that eat plants, for animals that eat animals that eat plants" for animals that eat animals that eat animals that eat plants, etc. (Levine 726) All humans rely on these plants to produce oxygen from photosynthesis. The presence of light and of the green pigment chlorophyll makes