If you want to tackle climate change, smog--with its asthma--and the host of other pollutants, like mercury, we need cleaner power production, and CEPA doesn't deal with that explicitly.
That doesn't really answer your question in a fair way, but in a practical way, if CEPA did a better job, or if the federal government were able to do something about the way power is produced in this country, we'd have a huge reduction.