What if the Haber–Bosch process had gone differently?

Nitrogen is pulled from the air to make fertiliser at industrial scale.

If it had gone differently: Farm yields hit a hard ceiling set by manure and guano; the planet feeds maybe half as many people.

The real history on Wikipedia ↗

Later turning points that leaned on the Haber–Bosch process. Change it in the game and the ripples reach all of these.

1. 1950The Green Revolution. Without it, Famine stays a normal feature of the late 20th century; populations in Asia and Latin America stall.