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.
Ok, strong example here: the long term efforts to stop forest fires caused build up of fuel that should have burned up in small fires which then instead burned up ecosystems which evolved for small forest fires and instead were destroyed in large ones.
That's a well intentioned environmental policy that had terrible effects.
Fuel efficiency programs with the goal of reducing emissions with exceptions for work vehicles killed small trucks and meant a ton of people who do approximately 0 work drive around enormous vehicles that were designed big to match the exception criteria.
That's another one.
Ethanol to replace gasoline is also an enormous negative consequence waste that started as an environmental program.
Things don't just work because you want them to and programs aren't automatically right because of what they intend to do.
Far too many people argue for things they don't understand at all because of the surface intention of them and treat discussion about them blasphemy. (I chose uncontroversial negative examples because I don't want to get sidetracked into arguments about my examples with zealots)