Good point. I'm quite sure it was brake dust because during COVID 19 lockdowns e... | Hacker News

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		epolanski 7 months ago \| parent \| context \| favorite \| on: Air pollution fell substantially as Paris restrict... Good point. I'm quite sure it was brake dust because during COVID 19 lockdowns everything was the same (heating etc) but streets were void of cars. Then I've read some scientific article about brake with pics and it looked exactly as what I got inside my house. I can't conclude 100% it was it (or just it), but it seems to be the most probable cause along tires.

FredPret 7 months ago [–]

Ah, that's interesting. Although I imagine cars kick up a lot of old-fashioned dirt dust from the road and swoosh up some more of that from the sidewalks as they drive as well.

epolanski 7 months ago | [–]

There was an article on the topic just today on the economist

https://www.economist.com/science-and-technology/2025/04/11/...

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