Reply to John Meyer: Cost vs benefit. Enormous cost. Small benefit.  Nanticoke was mostly used for "peaking". There was no need to run those generators 24 hours per day.  Coal fired generators are an excellent way to increase generation during those hours of the day when there is peak demand and shut them down when there is much less demand (night time for example).
In fact the Liberals allowed Toronto to build tens of thousands of glass walled condomiums which exaggerate the electricity peaks.  Glass is a very poor insulator.  Glass buildings need huge amounts of power for air conditioning when the sun shines on the walls in summer.  In winter, those walls  lose enormous amounts of heat which needs to be replaced.
Wind turbines and solar panel do their own thing. They generate electricity when conditions are right for them (wind blows, sun shines) and NOT when you need the electricity.