Have you ever wondered where carbs come from? Carbohydrates, the basic energy in plant food, are a combination of carbon dioxide, water, and sunlight. As you may know, here on planet Erath, the air is a pleasant, life-supporting mix of nitrogen (4/5), oxygen (1/5), a bit of carbon dioxide, and a few other gases. In order to make energy for themselves, plants use their leaves to absorb carbon dioxide (CO2) from the air and their roots to absorb water (H20) from the soil. When those carbon dioxide and water molecules reach the surfaces of leaves and flowers, they are exposed to the light of the sun. That sun exposure causes a chemical reaction that breaks C02, and H20 down to their most basic parts and reassembles them as carbohydrates, beginning with simple sugar know as glucose.
-Diaz, Cameron. The Body Book: The Law of Hunger, the Science of Strength, and Other Ways to Love Your Amazing Body. N.p.: HarperCollins, n.d. Print.