Originally Posted by
cyccommute
Notice that the fact sheet says particles that are 10 µm or less. The bulk of diesel particulates are sub 0.05µm which is way less than 10 µm. A bandana would be as effective as just about any dust mask.
Agreed. There is nothing much we can do about those sub 0.05µm particles other than trying to avoid exposure. At least we can do something about the bigger particles.
(Or nearly nothing we can do)
And subway doesn't seems to be any better
