Civilization manualBook 1: From Bare Hands to Steam and Electricity765 entries · 23 phases · 100 years
The Island
Phase 20 — Epoxy and the materials for tape and screen  /  About year 61
20.06

Ammonia made from the air ⚠

nitrogen and hydrogen joined under great pressure over hot iron: fertiliser and chemicals without limit

MakingYear 61Stands on 275 earlier

AWhat it needs

Needs 275 other products in all, 4 of them directly.

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