In the morning, the nose became cleaner, not clogged with any garbage, it became easier to breathe. Allergy season is coming soon, my son has a birch. Let's see what happens, how he will cope with the pollen. The neighbors make repairs and ventilate the apartment, we have such a wind rose that the whole thing brings us to the apartment. And the device periodically shows pollution 400+, but it lasts 1-2, then again to a minimum. and it doesn’t matter if you closed the windows or not, for some reason. Maybe the windows are old or unadjusted, which shows through all the cracks? ))) Most likely both.
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