Earlier quoted context omitted.
> In other words, the air on the plane was quite a bit cleaner when there were ashtrays next to the seats. That doesn't follow from what you wrote. Anyway, it is easy to look at actual research on cabin air quality and see your claim is false. "Typical levels of SHS-RSP on aircraft violated current (PM(2.5)) federal air quality standards approximately threefold for flight attendants, and exceeded SHS irritation thres…
The decrease in particles with the smoking ban doesn't prove or disprove what I'm asserting, which is that (a) bleed air into the cabin was reduced and (b) filters were replaced less often, after the tobacco ban. In fact, what I'm saying is that the airlines leveraged the tobacco ban and commensurate reduction in measurable PM(2.5) as a legal excuse to reduce filtration of air five-fold, resulting in much higher leve…
How do you know if the reduction in filters / bleed air causes more people to get sick? Filters would naturally require less replacement since they don’t have to take away as many toxins. Couldn’t that allow filters to free up more viral particles?