IN THE DEUTSCHES MUSEUM in Munich, separated from onlookers by a small barrier, stands the tabletop device Fritz Haber and Robert Le Rossignol built to fix nitrogen from the air. Onlookers occasionally stop, stare for a few seconds, and walk past, thinking little of this machine that launched the worldwide manufacture of synthetic fertilizer, a process that has given so many people their lives and—due to ongoing contamination of the environment with excess nitrogen—a process that has probably started the clock on their eventual destruction. — FRITZ HABER HAS ALLOWED three billion more people
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