It is almost certain that the poverty caused by the EPA regulations are now causing many times more sickness and death than the small amount of pollution that the regulations are now expensively trying to reduce.
The same is true for eliminating pollutants. The lower you drive the levels of a pollutant discharged the more expensive will be the method.
These are simple economics.
The fact that the left and the enviro-nuts do not realize or care about this fact shows that they have left the realm of rationality and have entered the realm of religious Zealotry.