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Fritz Haber was a German chemist who is considered one of the most important scientists of the 20th century. He developed a process for synthesizing ammonia from nitrogen and hydrogen gas, which revolutionized agriculture and helped to feed billions of people. However, he also developed chemical weapons for the German army during World War I, and his work is partly responsible for the deaths of millions of people. This video tells the story of Haber's life and work, and explores the complex ethical questions raised by his legacy.

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