Well, if you find it hard to believe, I welcome you to visit us and live here for a year or two. Don't forget to bring a good supply of spare lungs. These meas

Well, if you find it hard to believe, I welcome you to visit us and live here for a year or two. Don't forget to bring a good supply of spare lungs. These measurements are supported by the official (state-sponsored) air quality monitoring. I am not saying we have 1000+ micrograms 24/7. The daily average in winter time is closer to 300-500, depending on your location. However, I see such extreme measurements pretty much every single evening, with some going above 1500 µg/m³. Back in the days of the great London smog particulate concentrations were going up to 5 _milli_grams per cubic meter: https://sci-hub.se/https://pubmed.ncbi.nlm.nih.gov/29596258/# https://sci-hub.se/https://pubmed.ncbi.nlm.nih.gov/29596258/... It's not impossible or even particularly unusual.