When there is something in the air that you don't want in your lungs:
- Inhaling moves that air past the cilia in your lungs, enabling them to reap a fresh harvest of undesirable particulates from the air.
- Not exhaling ensures that the particulates that haven't been absorbed yet will be.
Do you take rapid, shallow breaths (maximize flux, minimize saturation)?
Do you take and hold a deep breath of the polluted air (minimize flux, maximize saturation)?
Or do you balance it out by breathing more or less normally?
(As usual, I've made the invisible "don't care" option right on top of your browser's Back button.)
EDIT: I'm shocked that I need to say this, but you'll notice there is no "minimize flux / minimize saturation" option. This is for a good reason - you're not holding your goddamned breath, remember? If you minimize both, you fall the hell unconscious and your body defaults to prolonged maximization of both.
And I don't know if y'all noticed this, but this is a poll. Scroll up a bit to see it.