How many coal power plants?

The present nuclear units in the US go up to 1100 MWe, larger ones are planned, up to 1600MWe. So coal plants are somewhat similar, but on one site you could have several units so making a larger...

There are more coal plants than solar plants because coal is much cheaper energy source than a solar plant.

No nuclear ones, apart from Bataan which has never operated

For steam from and, in emergencies, smoke to escape. CO2 is colourless and so when the smoke is white, it is steam. When it is black or grey, it is soot, carbon that has not combined with oxygen...