How do you solve a problem like Fritz Haber?

Fritz Haber, 1905
( Bundesarchiv, Bild 183-S13651 / CC-BY-SA-3.0-de (www.creativecommons.org/licenses/by-sa/3.0/de/deed.en) / Wikimedia Commons )
( Bundesarchiv, Bild 183-S13651 / CC-BY-SA-3.0-de (www.creativecommons.org/licenses/by-sa/3.0/de/deed.en) / Wikimedia Commons )
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