On November 9, 1989, the Berlin Wall, a symbol of Cold War division and oppression, was breached. Berliners poured through the newly opened checkpoints.
Theodore Mine
In 1904, potassium deposits were discovered in French Alsace. Potassium, or potash, is one of the most essential nutrients for plants, together with nitrogen and phosphorus. That is why potash was exploited to make fertilizer.
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