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Photosynthesis is the vital process by which green plants and some other organisms use sunlight to synthesize foods. convert light energy chemical energy, primarily using dioxide from the air water from the soil. This process place small structures chloroplasts, which contain a pigment known as . The main products are glucose, which provides energy for the plant, and oxygen, which is released into the atmosphere. This biological function forms the foundation for nearly all life on Earth by providing essential energy.