Resource Extraction Efficiency
All strategic resources have improved extraction through technologies.
So, for instance, Iron is discovered with Bronze Working and starts extracting 2 per turn with mines.
After Machinery is discovered, all improved iron sources have their extraction improved by 1, resulting in a total of +3 (2 base + 1 from technology) per turn, per improved source.
The total values stated above are PER IMPROVED SOURCE.
This might be unbalanced in vanilla but with unit maintenance overhauls it fits a little better.
Still, any feedback, helping to balance these values, maybe relocate to more "realistic" techs or to better balance the tech tree, is apreciated.
Required DLC:
These DLC should be installed in order to use this item.
Sid Meier's Civilizationu00ae VI: Gathering Storm