I’m very confused by the “logical quagmire” of legalizing weed while fighting climate change. What does one have to do with another?
And as far as weed being an environmental threat, like @Mjkacmom said, it’s quite possible to restrict where people can smoke–whatever it is they’re smoking. Like her, I live in New Jersey and am very happy with our strict smoking laws. Not having an issue with pot smoke near me in restaurants, beaches, or other outdoor places.
I don’t see the argument of weed being an environmental threat, unless you mean that a substance a person knowingly uses is an “environmental threat” and at that point you could also say that alcohol, tobacco, and other things people ingest are threats to their environments. But that’s not the usual use of “environmental.”
Secondhand smoke can be one, for sure, but again, there’s plenty legislation to control that. As you point out–it already exists to control the issue of tobacco smoke. If a state has lax laws concerning secondhand smoke, then that issue should be addressed–whether it’s from weed, tobacco, vapes, or any thing else (personally I’d like to include perfume, but I think that’s a non-starter.)