Must be blue and have a harbor:
Aluminum -
Coal - piggieland
Fish - piggieland
Gems - sulli90
Lead -
Lumber - X World
Marble -
Oil -
Rubber - Alzeria
Wine - sulli90
Gold - X World
Iron - Alzeria
Bonus:
Scholars
Microchips
Steel
Construction
Radiation Cleanup
Asphalt
Automobiles
Gives these benefits:
Initial infrastructure cost: -42%
Infrastructure upkeep: -23%
Population increase: 8%
Citizen income increase: $7.5
Population happiness increase: 12
Initial land cost: -15%
Purchased land area increase: 35%
Natural growth increase: 0%
Technology cost decrease: -13%
Environment increase: 10%
Environment decrease: -1
Soldier increase: 38%
Soldier cost decrease: $-6
Soldier upkeep cost: $-0.5
Tank cost decrease: -13%
Tank upkeep cost: -13%
Aircraft cost decrease: -16%
Aircraft upkeep: -20%
Aircraft limit increase: 10
Cruise missle cost decrease: -20%
Cruise missle upkeep: -20%
Nuke cost decrease: -20%
Nuke upkeep: -20%
Plus the +5 Happiness from trading in Blue
