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Devac  ·  1168 days ago  ·  link  ·    ·  parent  ·  post: Can China Take Care of its Elderly?

Unless I'm missing the point completely, that's way before Frank-Caro and Haber-Bosh processes were used industrially for fertiliser production, though. Even with those tech constraints, you could probably double those numbers as long we can reliably fixate nitrogen.