Einheiten
Stadtausbauten
Wunder
Technologien
Besonderheiten
Allows settlers and engineers to double-irrigate lands.
All city squares are automatically upgraded to farmland (double-irrigation) when Refrigeration is discovered.
The benefits of double-irrigation, 50% food production bonus, will only be realized once the city has built the Supermarket improvement. Interestingly, the Refrigeration advance is not needed for this to take effect.
