2 ms·

Interesting. What made you think that? I was under the impression that passive smoking was pretty well studied.

• WalterBright 4y ago
  For one thing, the concentration has to be a thousand times less. For another, you're just not around it that much. For a third, how can one reliably measure the exposure? Far too many variables.
  • 5e92cb50239222b 4y ago
    PM2.5 concentrations tend to be very high around smokers. I live next to one, and even though we're separated by a door and he smokes in his own apartment, the smoking frequently pushes air in my apartment above 200 µg/m³. (I have 3 years of data to prove it.) Since the outside air is typically even more dangerous here, I can't simply open a window and have to use air filters to combat this. https://0x0.st/s/6LnsVC92Wy4es4tLN9iF5w/ohKp.png https://0x0.st/s/6LnsVC92Wy4es4tLN9iF5w/ohKp.png
    • WalterBright 4y ago
      So the outside air is more dangerous than second hand smoke?