During the meetings there were ashtrays on the conference table, and smoke filled the room
That would lead to significant reduction of death and morbidity, as well as medical cost. The NHS states that smoking increases your risk of developing more than 50 serious health conditions, and around seven out of every 10 cases of lung cancer in the UK
Alteration in the microbiota depends upon two factors: first, shift in taxonomic makeup, such as lower-alpha diversification, lower expression of firmicutes and bacteroides, higher frequency of adhering invaders, decreasing quantities of Faecalibacterium prausnitzi i, higher incidence of Gammaproteobacteri , and second is a microbial function such as diminished short-chain fatty acid generation and amino acid synthesizing, enhanced oxidative stress, elevated sulfate transportation, and steadily increasing auxotrophy [36]
This won't be enough to get rid of strong or old smells, but it may help get rid of less obvious odors
Then you can be sure that your property is completely rid of smoke smells and safe