Why has one of the world’s most important scientists been forgotten? He worked with nitrogen, making discoveries that helped feed billions, but arguably, kill millions.

Why has one of the world’s most important scientists been forgotten? Fritz Haber was the brilliant German Jewish chemist who used nitrogen to help feed billions, but arguably, kill millions.

He worked with something without which, we'd all be dead. It's in our DNA and the plants we eat could not exist without it.

Find out why with Mike Williams.

(Image: Fritz Haber Photo by Topical Press Agency/Getty Images)