Photosynthesis is a process of converting carbon dioxide and water into glucose and oxygen in the presence of sunlight. This process is found in plants, some algae, and some photosynthesizing prokaryotes. Photosynthesis takes place in the green leaves of plants. The green colour comes from pigment chlorophyll within chloroplasts. Chlorophyll absorbs sunlight and activates a series of reaction which results in the production of glucose while oxygen is released as a waste.