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by wcoenen 1511 days ago
Because of high natural gas prices.

The production of fertilizers such as ammonium nitrate and urea require ammonia. Ammonia is synthesized on large scales with the Haber-Bosch process. This process requires hydrogen, which is obtained by steam reforming of methane in natural gas.

When natural gas prices exploded in Europe, many fertilizer factories had to stop production:

https://www.bloomberg.com/news/articles/2021-09-15/soaring-e...