"Power (Image:Power.png) refers to electrical power, and its purpose is to augment the Factory with an additional +50% Image:Hammer.png. The existence of the asset in a city adds an unconditional unhealth penalty of +2 Image:Unhealthiness.png irrespective of the source and whether the power is being put to use by this structure. Power generated by a Dirty source (coal or shale) carries with it an extra +2 Image:Unhealthiness.png penalty. Clean power sources, when available, take the place of dirty power and remove this additional burden."@en . . "Power (Civ4)"@en . . "Power (Image:Power.png) refers to electrical power, and its purpose is to augment the Factory with an additional +50% Image:Hammer.png. The existence of the asset in a city adds an unconditional unhealth penalty of +2 Image:Unhealthiness.png irrespective of the source and whether the power is being put to use by this structure. Power generated by a Dirty source (coal or shale) carries with it an extra +2 Image:Unhealthiness.png penalty. Clean power sources, when available, take the place of dirty power and remove this additional burden."@en . . .