> which should be filtered on its way in anyway Not really unless the car comes with HEPA filters [1], which most don't. [1] https://ww2.arb.ca.gov/resources/

> which should be filtered on its way in anyway Not really unless the car comes with HEPA filters [1], which most don't. [1] https://ww2.arb.ca.gov/resources/documents/car-bus-exposure-studies https://ww2.arb.ca.gov/resources/documents/car-bus-exposure-...