This trade circle is long term, harbor needed. Please PM me or post here if you are interested.
Microchips - Reduces technology cost -8%, increases population happiness +2. Requires Gold, Lead, Oil, and a technology level greater than 10.
Scholars - Increases population income +$3.00. Requires a literacy rate greater than 90%, Lumber, and Lead.
Steel - Reduces infrastructure cost -2%. Requires Coal and Iron.
Beer - Increases population happiness + 2. Requires Water, Wheat, Lumber, and Aluminum.
Construction - Reduces infrastructure cost -5% and raises the aircraft limit +10. Requires Lumber, Iron, Marble, Aluminum, and a technology level greater than 5.
Asphalt - Decreases infrastructure upkeep cost -5%. Requires Construction, Oil, and Rubber.
Automobiles - Increases population happiness +3. Requires Asphalt and Steel.
Radiation Cleanup - Removes 1 day of nuclear anarchy. Improves a nations environment by 10%. Requires Construction, Microchips, Steel, and a technology level greater than 15.