Coal (Civ4)

Coal is a resource in Civilization IV.
== Strategy ==
Coal provides Production to the city that works it, with +1 tile bonus yield and an additional +1 bonus with a Mine.
The only unit which requires Coal is the Ironclad. While Coal Plants may be built without access to Coal, they will not provide any Power unless Coal is present in the city. Coal, along with Oil, allows Workers to build railroads. Besides increasing transportation speed, railroads give +1 with Lumbermills, Mines, and Quarries. Coal provides an additional +50% with the Ironworks.
The Production bonuses of Coal come with significant Unhealthiness penalties. Coal produces +2 with Factories and +1 with Industrial Parks. When producing Power, Coal Plants (and Shale Plants) produce +4 compared to the +2 with clean power sources. When operational, clean power sources supersede Coal Plants (and Shale Plants), thereby reducing by 2.
While Power may be provided by alternative means, and railroads may be built with Oil, the +50% bonus with the Ironworks absolutely requires access to Coal. If is a severe issue, it may be desirable to cut off access to Coal by trading away all Coal trade resources, or by destroying Coal Mines; however, this strategy will result in the loss of the +50% Ironworks bonus.
Coal is especially attractive to the German player, as Coal provides double production speed when building the Factory-replacement Assembly Plant.
Coal is also relevant to Corporations. When present in a city with Aluminum Co., Coal provides +3 per Coal resource, and also provides access to Aluminum within that city. When present in a city with Mining Inc., each Coal resources provides +1 .
== Civilopedia entry ==
== See also ==
* Coal in other games