These three interactive comics will teach you the importance of Nitrogen, Phosphorus, and Potassium in our lives. Choose which interactive comic you want to see and click on the button to start it. Understanding Nitrogen in our world. Understanding Phosphorus in our world. Understanding Potassium in our world. Did you know: There are 740 million pounds of nitrogen per acre squashing down on you right now. Did you know: Some of the phosphorus in your bones was probably part of the bones of a dinosaur 60 million years ago. Did you know: Without potassium, your heart would stop beating. Kidsweb is adapted from a booklet series developed by the International Plant Nutrition Insititute.