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Re:Car tires biggest likely source of microplastics in Calif... by hinkley on Wednesday October 02, 2019 @03:13PM (#21139802)
There's another thread that claims that was 50 years ago.

I believe a lot of the stopping power comes from ceramic cinders in the pads. Those showed up in high end bicycle brake pads about 25 years ago, and I think they were old news in high performance cars before that. I have a fuzzy recollection that they trickled down into mid-tier vehicles not long after that. 2000-ish?

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