Tucked away in the North East of England is ICL Boulby Mine, a working polyhalite and salt mine and the second deepest in Europe. Over 1km below the surface, in a small corner of the giant mine's ...

The mine holds an estimated 7.2 billion metric tonnes of iron ore, making it the richest and largest deposit in the world, critical to global iron supply. Larger than most cities, the Carajás ...