Nitrogen is an important ingredient in the proteins that make our body cells. Humans have found lots of other incredible uses for this element, too. We use it to freeze food, preserve blood, and remove tattoos and skin cancer, and that's just in nitrogen's liquid form. Readers of this informative book will learn about these and other uses for nitrogen. An immersive design and straightforward text help readers engage. A concluding quiz lets readers test their knowledge. Illustrations, photographs, and infographics bring the lesson into detailed focus. This accessible book is the perfect introduction to this essential element.