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Kenbishi t1_iut6jot wrote

Reply to comment by tallulahQ in 30 minutes of car preheating in sub-zero conditions produces as much particulate emissions as driving 97km in a gasoline car, or 20km in a diesel car “These findings do not suggest to stop preheating cars; instead, we could reduce the emissions by using similar methods that are in place for engine” by giuliomagnifico

Interior Alaska. There was zero wind. We were suffering from an inversion at the time so all of the moisture from the vehicle exhaust and wood smoke from wood stoves was collecting in the valley as ice fog, and it was so dense you could barely see to drive (plus it reflected headlights back at you worse than regular fog).

They didn’t close schools due to the temperature, but only closed them because of the number of bus accidents occurring on the roads due to poor visibility because of the ice fog. I don’t know if things have changed, but they didn’t even have a provision for closing schools at the time because of the temperature.

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tallulahQ t1_iuucz51 wrote

Oh wow. Yeah I know what you mean about the temperature causing school closures, it’s common now but it didn’t used to be a thing. That’s crazy though! Especially if people had had to go outside after those accidents. -70F puts you at extreme danger of frostbite within minutes (although perhaps less so if zero wind? Not sure, just my guess).

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