reuters says "The WHO considers PM2.5 concentrations above 50 micrograms per cubic metre "severe" air pollution." but I couldn't actually find that in WHO global air quality guidelines or anywhere else. china considers >500 µg/m³ "severe" (严重) and everything on the map would be below that
4 Comments
CandleTiger@programming.dev · 3 pts · 156d
February 25, 2025
Aatube@kbin.melroy.org · 2 pts · 156d
so did they?
hourly CN air quality map, unit is µg/m³: https://www.air-level.com/
reuters says "The WHO considers PM2.5 concentrations above 50 micrograms per cubic metre "severe" air pollution." but I couldn't actually find that in WHO global air quality guidelines or anywhere else. china considers >500 µg/m³ "severe" (严重) and everything on the map would be below that
Bentov@lemmy.world · 2 pts · 156d
Not paywalled for me.
Lemmyoutofhere@lemmy.ca · 1 pts · 156d
Paywalled