These levels of pollutants from fuel combustion are very high, much more than you get necessarily in your ambient, outdoor air
The agent prepares for the ingredients, waits on the table, makes the ingredients available on the table when it becomes available, signals the proper smoker to take the ingredient, and then goes back for another round
Since SnusCENTRAL.org is a snus-centric website, Id prefer that be your focus
However, when they repeated the experiment in winter months, they found no thirdhand smoke compounds in the room, showing that the cooling of outside air was key for their uptake into the air
Oral cancer: etiology and risk factors: A review