And what happens within the red blood cells in the lungs? The hemoglobin releases that carbon dioxide. The 10% into this bundle here and together the 10% released by hemoglobin, the 85% that was held by bicarbonate, and the 5% that was dissolved in the blood plasma. All this carbon dioxide basically leaves the red blood plasma cell and events essentially enters the alveolar space. And then via the process of exhalation, we essentially expel and release all that carbon dioxide into the outside environment. And then the plants use this CO2 in a process called photosynthesis to basically produce sugar molecules.