I'm not in front of the game, but you're saying that all power buildings produce

, correct? It's just that when coal is being used it also creates another 2

. This does go away if you switch power sources, but is not affected by a recycling center since the 2

from coal power is not a building.
That would explain the problem if all power plants produce 2

.
Hi
When I first noticed this it had me going "huh?" too like maybe hydro plants weren't working right or something. I even made my own thread bout it a little while back. But after I first made it I did some checking using world builder and putting different types of power buildings in cities and seeing what happens.
This is what I found. Power NOT the power building but "power" causes 2 yucky faces all by itself. Meaning if a city has a lightning bolt it dont matter how it is getting it if it is a building or result of building 3 gorges it will get 2 yucky faces. And since coal plants still add 2 yucky faces by themselves that means if you getting power by coal plants then you getting 4 yucky faces. If you switch how that city is getting power with another power building or 3 gorges the coal plant penalty goes away but the plus 2 just for having a lightning bolt still there and never goes away not if you build recycling plants.
One little minor thing about this and 3 gorges dam is if you build it since all cities on same continent get hooked up they all get lightning bolts whether they using a factory or not. That means building it means not needing to build power plants anymore but it also means instantly adding 2 yucky faces to every city in your civ on that continent even if they dont have a factory yet.
Having access to coal and oil will also add yucky faces if you have factories and if you have industrial parks. But thses yucky faces are seperat issues form the power yucky faces.
If you ever look at the healthiness report for a city you get yucky faces from population, flood plains, jungles, buildings and power. Thats the way it was in vanilla and in warlord. BtS adds 2 other ways to get yucky faces --well poisoning (which you cant really do anything about) and from "bonuses".
Yucky faces from bonuses come as result of having a factory and/or AND having acess to coal and/or oil. Now factory all by itself will give 1 yucky face. Thats a yucky face "from buildings" type and can be stopped by a recycling center. BUT if you have factory and access to coal it will add 2 additional yucky faces and this counts as yucky faces "from bonuses" If you have acces to oil and a factory the oil will give 2 "from bonuses" yucky faces and it will stack with the coal so having BOTH will mean 4 yucky faces from bonuses and a recycling center wont erase those since they are not "from buildings".
So what all that means is if you plan on having a city with a factory and with power and have acess to coal and oil that city will have 6 more yucky faces (8 yucky faces of power is from a coal plant) to deal with than it would if the same city was in a vanilla or warlords game.
Industrail parks and public transportaion also factor in but come in later and they weren't things in vanilla and warlords and not using those would show more clearly how yucky faces have changed now in BtS.
Personally I kinda like the change. It means Industrializing your empire will have a BIG effect on it especially at the beginning before you get technologies and buildings to deal with it. While it can be a pain if you have a few high population cities suddendly going into starvation it is realistic to expect industry to have a impact like that. And it is still NOWHERE near as annoying as having pollution popping up on tiles left and right that workers need to clean up like in Civ2 and 3.
So I think that good compromize. Industry can have noticible negative impact you will have to deal with but the ways to deal with it are not as tedious as playing "find waldo" with little pollution spills so you can send workers to clean it up.
Kaytie