Interesting topic. Do you feel anecdotally any differences in your wellbeing with abundant filtering? Significantly better breathing? Is your city significatly polluted?
Not pollution (Boston is fine) but reducing covid risk for elderly relatives
Interesting topic. Do you feel anecdotally any differences in your wellbeing with abundant filtering? Significantly better breathing? Is your city significatly polluted?
Not pollution (Boston is fine) but reducing covid risk for elderly relatives