Ok, i am editing everything as i just learned that only trade circles can be done here,
ok, a trade circle... of the next items:
Pigs, Spices, Uranium, Lumber, Gold, Aluminum, Iron, Marble, Coal and Marble...
this would make us have the next bonus resources:
Scolars**
Asphalt
Construction*
Micro Chips
Radiation Cleanup
Steel
Automobiles
*= tech level needed
**=iliteracy level needed
this is the best combination i was able of making, this would give us the next advantages:
infraestructure upkeep -12%
infraestructure puchase cost -43%
Land purchase cost -10%
land cost when selling x3
purchased land area +43%
number of citizens +3.5%
citizen´s daily income +6.00
population happines +8.5
tech cost -13%
environment penalties for owning nuclear weapons -50%
Soldier Efficiency +53%
Soldiers Purchase cost -6.00
soldier upkeep -1.00
Tanks upkeep -18%
Tanks purchase - 8%
aircraft purchase cost -12%
aircraft upkeep -25%
aircraft limit +10
navy vessel upkeep cost -30%.
navy vessel purchase cost -15%
misiles upkeep -20%
nuclear anarchy effects -1 day
nation environment +1
global radiation for your nation -50%
and uranium would give us this: Uranium – Reduces infrastructure upkeep cost -3%. Allow nations to develop nuclear weapons only if that nations government preference supports nuclear weapons. If a nations government preference favors nuclear technology for the use of nuclear power plants but does not support nuclear weapons then the nation will receive +$3.00 per citizen and +$0.15 for every level of tech purchased up to level 30 but loses -1 population happiness. If a nation owns nuclear weapons but does not have uranium the cost to maintain nukes is doubled. Lowers Submarine and Aircraft Carrier navy vessel purchase and upkeep cost -5%.
i´m kind of new, so please, foregive me for my mistakes, hope people can join,