Plants use carbon dioxide to make their food through a process called photosynthesis.

During photosynthesis, plants take in carbon dioxide from the atmosphere and water from the soil. They use sunlight to convert these into glucose (sugar), which is their food, and oxygen, which is released back into the atmosphere.

You can find more information about photosynthesis and the role of carbon dioxide on the following websites:

• Science Learning Hub - Photosynthesis
• Britannica - Photosynthesis