I haven't listed the Tech req for each PP.
The specific

cost of each PP isn't listed either, just a note of the level of price. If nothing is mentioned, it is medium.
Coal Plant:
3 per city
+ medium power output (PO)
- Req coal, Lots of
Oil Plant
2 per city
+ medium PO
- Req Oil,

(less than Coal Plant)
Natural Gas plant
(I know Natural Gas isn't a current resource in ROM)
2 per city
+ medium PO
- Req Natural Gas,

(less than Oil Plant)
Nuclear Plant
1 per city (too powerful to have more)
+ High PO, + 5 :Science:, 1 Scientist
- Req Uranium and Lead and Concrete, Produces Nuclear Waste Resource

yuck:/

), lots of

, Can melt down, 1

(4 with Green)
Hydro Plant
1 per city (there is a limited amount of energy in a river)
+ Medium PO
- Req Steel and Concrete, River in City Radius
Biofuel Plant
2 per city
+ Medium PO
- Req corn OR Wheat OR Rice, -10
Solar Plant
3 per city
+ Low PO, 1

with Green
- +10% Maintenance
Wave Plant
3 per city
+ Low PO, 1

with Green
- Req Coastal City, +10% Maintenance
Windmill park
3 per city
+ Low PO, 1

with Green
- Req Steel, +10% Maintenance
Waste (Bio gas) Plant
2 per city
+ low PO, 4

, 1

with Green
- +20% Maintenance (there is a lot of sorting trash for this to work)
Geothermal plant
1 per city
+ medium PO
- Req Geothermal Resource (in city if possible code wise)
Hydrogen Plant
1 per city
+ medium PO
- Req Hydrogen Ice resource (or what's it called)
Three Gorges Dam
National Wonder, 1 allowed
+ Very high PO
- Req Steel and Concrete, lots and lots of
Fusion Plant
National Wonder, 3 allowed
+ Very high PO
- Lots and lots and lots of

, Req Collieder (or what's it called)
Next step is the Power Plants of the Future