Steel is one of the most important building materials in use today. It's used to create skyscrapers, bridges, and many other large constructions. And what's a key part of steel creation? Iron ore, a natural resource! In fact, about 98 percent of all mined iron ore is used in the production of steel. In this instructive volume, readers explore how iron ore forms, where it is found, and how it is made into steel. Full-color photographs and graphic organizers complement the main text. Sidebars and fact boxes add even more information.