The difference between C3 and C4 photosynthesis is that C3 photosynthesis uses a rubisco which binds to oxygen. Meanwhile, C4 photosynthesis contains a different enzyme that binds carbon dioxide and not oxygen. On the other hand, CAM photosynthesis, carbon fixation takes place at night and the Calvin cycle occurs during the day. C3 photosynthesis plants also benefit from a cool, humid environment with natural sunlight. Photorespiration will likely take place as the temperature rises, the heat will cause leaf stomata to close to conserve water. Unlike C3 photosynthesis, C4 photosynthesis benefits from dry, warm and sunny conditions. At the same time, CAM photosynthesis benefits from hot, dry climates. Different from C3 and C4, CAM photosynthesis allows carbon fixation only at