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Jeff Kaufman
jefftk.com
did:plc:k35xx6alir7rsmwfzh74abnp
I've started masking on the subway again. Not because of covid or anything we've found at the NAO, but because of the extremely high pm2.5 levels from brake dust.
https://www.jefftk.com/p/masking-on-the-subway
2025-07-05T14:40:39.641Z