9 ms·

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 l

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).