If, however, you cant find the source of the problem, the issue could be that a vent pipe, which routes sewer gas up and out through your roof, is broken or clogged
The proposal was immediately derided by one activist for tobacco users, who questioned whether it was enforceable
In answer to the more direct question of how much nicotine per day is safe, a reasonable starting point might be, "How much nicotine might it take to poison someone?" The ECHA currently gives an "acute toxicity estimate" (ATE) for nicotine via the oral route to be 5 mg/kg bw [7] , meaning 5mg of nicotine for every kilogram of bodyweight of the person consuming the nicotine
Physiol 318:C20514 [DOI] [PMC free article] [PubMed] [Google Scholar] 119.Clapp PW, Pawlak EA, Lackey JT, Keating JE, Reeber SL, et al
It was not a great success