00:00Fritz Haber saved billions of lives.
00:02He also helped kill millions of them.
00:04In the early 1900s, Haber cracked one of science's hardest problems.
00:09He learned how to pull nitrogen from thin air and turn it into fertilizer.
00:12That discovery feeds roughly half the people alive on Earth today.
00:16Half the planet eats because of one man.
00:19Then World War I began.
00:21Haber personally designed the first mass chemical weapons attack in history.
00:24On April 22nd, 1915, at Ipres, Belgium, he stood and watched as 168 tons of chlorine gas
00:34rolled toward allied trenches.
00:36Thousands choked to death in minutes.
00:38He came home celebrating.
00:40That same night, his wife Clara, also a chemist, walked into their garden and shot herself.
00:45But the story doesn't end there.
00:47The poison chemistry Haber built was later refined by his own successors into Zyklon B,
00:52the same science, a different target, his own people, in the Holocaust.
00:58Fritz Haber gave the world food and gave it death.
01:00And the death eventually came for everything he loved.
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