It was an early December day, winter storm Barra was battering the north of England and all of a sudden it felt almost inconceivable that at this very moment there were miners sweating deep under the North Sea in temperatures hotter than a desert to extract a rock most people have never heard of before. In time, perhaps that will change. Since the mine switched from potash to polyhalite, the rocks coming out have been ground into grains and sold all over the world. There is Boulby polyhalite being sprinkled on the ground in China, in Brazil, in the U.S. and all over Europe. Today, these rocks
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