Coke is one of the 3 fuels in ymir.
It takes 1 Coal to make 1 Coke.
A Kiln can produce 2 Coke per worker (if state policies are neglected).
To produce one unit of coke one workforce is required.
The base price is 1 coin.
Coke can be used as a fuel in some but not all buildings. buildings like the Bakery cant use coke and have to use either Wood or Charcoal. other buildings like the foundry (when smelting Iron) have to use either Coke or Charcoal.
It is unlocked by Coke