It is not uncommon knowledge that California has Proposition 65, and that many products bear this warning even if sold outside of California because they are are also sold unaltered in the state and must follow the appropriate labeling rules. So many people are already aware of this “meme”.
well, if the contaminants are in the air, business have two choices: either fully hermetic spaces with air filtration, or every single place will have now to show the warning, because of the air inside.