The parent was saying the US approach instead define what a harmful chemical is after the fact. Leaving companies to need "insurance"/a cost benefit wager before something is built. Otherwise they could be screwed later after litigation.
IMO, I can see both sides but preferably I would want simpler laws from political processes which are then refined into explicit interpretations by subject matter expert strong government institutions. But we have lobbying/revolving door government employees and trashy textualists in the US so it doesn't work out that way...
A federal 3 letter agency unilaterally writes detailed regulations, that are for practical purposes law.
One problem is that the regulatory agency gets captured by the industry, which means the regulation ends up being a way for the established industries and companies to make competition unfeasible.
https://en.wikipedia.org/wiki/Chevron_U.S.A.,_Inc._v._Natura....
It's really tough to find lots of people who can do all that for not much money / acclaim potential.
> We need good regulation, not less
The result of the research is that that is, in general impossible. Sure, some regulators do good work for some period. But the general forces and incentives in play push quite strongly towards the regulator being captured.
The better working alternatives are laws, where disputes or guilt are decided by courts. Since there is no regulator to capture in this scenario, things work pretty well. Of course, lawmakers can also be captured, but that's harder.
One fascinating* thing with the field of economics is that so m any thinks their opinion is worth as much as the expertise of professional in the field.
You routinely hear people confidently claim the economics field is wrong about things they've studied for decades or centuries, because of simple arguments that are all thoroughly accounted for in the beginner literature.
* or "infuriating", if you are an economist :)
A place that needs to dispose a certain volume of X with concentration >Y then pays a sort of a mixologist to dilute X to a concentration <=Y before dumping it all anyway (unless it would be less expensive and more practical to react X away).