The Benefits of Co Two to Land Plants

Plants have to breathe in c o two from the air through little holes in their leaves. While c o two is diffusing in through those holes for the plant to use water, vapor is diffusing out at a much higher rate. So plants typically need a hundred grams of water to make a gram of carbohydrate - these losses are greatly reduced as you increase co two. Soh it's not very complicated, and it's very easily observed.