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"Smoke" is underselling it a bit. Tyre wear creates PM2.5, which is toxic. I don't consider that outright misleading in comparison to misstating an upper bound
by the8472 7y ago
"Smoke" is underselling it a bit. Tyre wear creates PM2.5, which is toxic. I don't consider that outright misleading in comparison to misstating an upper bound as a tight bound.
- ajross 7y agoAs described in the article, the number they used for the "1000x" comparison wasn't PM2.5 due to car exhaust. It was PM2.5 IN car exhaust, which is quite literally the thing we call "smoke". The vast majority of smog particles due to automobile traffic appear in the atmosphere as reaction products, they aren't in the exhaust.
- labawi 7y agoAre you talking about non-PM (particulate matter) pollution such as NOx, which comes from exhaust but can create ozone?