Fritz Haber and Carl Bosch developed a method to synthesize ammonia from nitrogen in the air and hydrogen gas. This invention is often called 'bread from air' because it allowed for the mass production of synthetic fertilizers. Before this, agriculture relied on limited natural sources like manure or guano. The Haber-Bosch process triggered a global population explosion; it is estimated that nearly 50% of the nitrogen in the human body today comes from this synthetic process. However, the technology also enabled the production of high explosives used in both World Wars. It remains one of the most consequential inventions in history, posing a dual legacy as both a savior of billions from starvation and a tool for mass destruction.