Photosynthesis in green plants use the energy form sunlight to convert carbon dioxide,water and minerals into organic food. Photosynthesis occur in the leaves of plants The roots take in water form the soil and this goes up the stem to the leaves. Tiny holes the leaf absorb carbon dioxide from the air.The leaf obtains light energy form the sun's rays.The chloroplasts trap the light provide nutrition for healthy plant growth .in the process of photosynthesis, oxygen escape through the tiny holes in the leaf's into the atmosphere.