I don't mean to trivialize the issue. Polution is and has been a serious problem in this country for a long time and I understand little about it other than it's bad. Still, if it comes to choosing between staying warm in the winter and having a job vs no smog, I think most will choose the former. Maybe someday everyone can have both.
but it's not an either or problem. I work in the power industry, and when the clean air act came into effect the number of available jobs went way up.
the thing is that it doesn't stop the building of plants. people will not stand for turning on the switch and having no power (the oposition to building permits for new power plants in california almost completely stopped after the first few blackouts).
the work increases because the restrictions don't restrict power they restrict emisions. we have the technology to greatly reduce these imissions (electrostatic precipitators, air scrubbers, and bag-houses to name a few).
all these require men to build them and that means jobs. thats good for the economy in the areas around the plants and in the areas the workers live (most travel temporarily to the area while building a new plant or upgrading emission systems).
this is also a much more fair situation. without emission controls people who use the power save some cash on the bill while those who live in the area of the plant (and down wind from the stack) suffer. and since most power isn't made where it is used you end up with a very small group (they generally try not to put these plants where many people live) paying the most for something that benifits others who live elsewhere.
and eventually the pollution spreads out enough that all our kids can breath some.