Changes

Cities [[City Specializations|specialized]] in trading buy and sell [[commodities]] on the [[Global Market]] to generate profit. The key to trading is to import resources when their prices are low and export resources when their prices are high. A [[#Trade Depot|Trade Depot]] must be constructed before the player can start trading. A [[#Trade Port|trade port]] can be constructed to accelerate the trading processes. A city specialized in trading will have many trucks and cargo ships moving goods into and out of the city.