cells use carbon dioxide and energy from the Sun to make sugar molecules and oxygen then via respiration processes, cells use oxygen and glucose to synthesize energy-rich carrier molecules, such as ATP, and carbon dioxide is produced as a waste product!
During photosynthesis plants take in carbon dioxide and water from the air and soil. This transforms the water into oxygen and the carbon dioxide into glucose. The plant then releases the oxygen back into the air, and keeps energy within the glucose molecules.
