Excuse me, if this is the wrong sub for this but I’m genuinly confused. According to [this graph](https://flic.kr/p/5T5hkE) I found by accident, the world population barely increased at all between 1300 and 1900. And then it suddenly took off like crazy. What caused this sudden fast increment of the world population?
In: 78
The Haber-Bosch process, developed in WWI Germany removed the limits on food production imposed by scarce nitrogen fertilizers. Ammonia could be produced with nitrogen from the air, hydrogen, and an iron catalyst. This improved crop yields many times.
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