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“Sometimes called the most important technological advance of this century, the Haber-Bosch process allows the economical mass synthesis of ammonia (NH3) from nitrogen and hydrogen. It was developed immediately prior to World War I by Fritz Haber and Carl Bosch, German chemists. Haber won the Nobel Prize for Chemistry in 1918 for his discoveries, while Bosch shared a Nobel Prize with Friedrich Bergius in 1931 for his work on high-pressure chemical reactions. At first a German national secret, the chemistry and techniques behind the effective synthesis of ammonia spread to the rest of the world in the 20s and 30s.” source...