Photosynthesis in green plants use the energy from sunlight to convert carbon dioxide,water and minerals into organic food. Photosynthesis occur in the leaves of plants. Tiny holes in the leaf obsorb carbon dioxide from the air. the leaf obtains light energy from the sun's rays. the chloroplast trap the light energy and use it to manufacture food. The leaf makes carbohydrates. These provide nutrition for healthy plant growth. In the process of photosynthesis,oxygen escapes through the tiny holes in the leaf's surface into the atmosphere.