Turning "environmental regulation" into a unified bloc that must be either supported or opposed in totality is a manipulative political maneuver and it should be forcefully rejected.
Regulations are not people, and they don't have rights. It is fair and reasonable to demand that environmental regulation justify its existence with hard, scientifically verifiable data or else get chopped. Clearly, banning leaded gasoline has that kind of justification, and therefore I'm strongly in favor of maintaining that ban and extending it wherever it isn't in place yet. The same reasonable standard should be applied to other regulations across the board.
The worst environmental crisis in human history is going largely unchecked. I find it hard to take seriously any argument that environmental regulation has gone too far as opposed to not nearly far enough.
If there's a specific regulation that can be shown to be doing more harm than good I'm cool with revisiting anything, but the common sense wisdom around environmental regulation has been corrupted by corporate public relations campaigns.
Now the cost of solar and storage are dropping at a rate I doubt nuclear is ever going to make a significant comeback. I'm not opposed to it, but I wonder if the economics will ever be favorable even with regulatory reform.
Likewise, an even bigger "disaster" at Fukushima--that killed nobody. (The deaths from the evacuation are not deaths from the incident--they wouldn't have died if they had stayed put.)