> According to this logic, anyone who works in the subway should be dying, what, 10 years earlier? Which is obviously not happening.
I don't think you're being honest here, it obviously isn't try to make the point that each commute = 1 year, that's why it's in the "lifestyle" category and not in the "single event" one
> it obviously isn't try to make the point that each commute = 1 year
They aren't saying one commute takes a year off the life. They're saying that people who's job is riding the public commute infrastructure spend roughly 20 times as much time breathing the air in the commuter infrastructure as people who commute to/from work, so if the effect is linear... that's roughly a 10 year reduction in lifespan.
Or, are you trying to say that some underlying common factor between commuting and home/office air quality is present, and so the commute is just a proxy for that common factor? If that's the case, if that common factor is identifiable, it should be named. If that common factor isn't identifiable, how are we confident in attributing it to air quality?
Or, are you claiming that the air quality in the commute infrastructure is the culprit, but the effect is dramatically sublinear?
I don't think you're being honest here, it obviously isn't try to make the point that each commute = 1 year, that's why it's in the "lifestyle" category and not in the "single event" one