4 ms·

Oof. Flashbacks to living 75ish meters off a gravel road as a kid.

• nerdponx 4y ago
  Or in New York City, where the combination of vehicle exhaust particulates, poor airflow in many apartments, and old masonry dust causes every surface to look like a haunted house within a month if you aren't on top of things.
  • kzrdude 4y ago
    And to think we breathe that. Not fun. We have natural defenses (hair and mucus membranes, but they presumably only tackle a percentage).