brin_bellway: forget-me-not flowers (Default)
Brin ([personal profile] brin_bellway) wrote2022-04-25 09:04 pm

The tyranny of mathematics

[cw: poison]


~1 breath per 6 seconds * 60 seconds/minute = ~10 breaths/minute

~10 breaths/minute * ~90 minutes = ~900 breaths

~900 filtered breaths * ~1% remaining post-filtration particles = ~9 unfiltered-breath-equivalents

9 unfiltered outdoor breaths = a mild-but-noticeable sore throat, maybe a sniffle or two