HOMER CITY, Pa. (AP) — A massive coal-fired power plant in western Pennsylvania is turning from one of the worst polluters in the country to a model for how such a facility can clean up its act.

Homer City Generating Station is expected to make the transformation in a few years. When it does, it will end four decades of nearly limitless pollution from two of its units that had long escaped regulation.

Three years ago the plant was the first to sue the Obama administration over a rule to force it to reduce its sulfur dioxide pollution, arguing it would spike electricity prices and cause "immediate and devastating" consequences. None of those dire predictions came to pass.

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