Sorry if this is the wrong place but I want to understand something :
Windy says "CO concentration: Carbon monoxide is a colorless, odorless, and tasteless gas that is slightly less dense than air. The level of CO concentration in the troposphere is measured by a system called Parts Per Billion by Volume (PPBV)."
I've found some different thresholds on the web in microgram per cubic meters
I wanted to check, in my city how much we were about some dangerous thresholds.
My city was at 173 PPBV but I had some troubles converting these 173 PPBV in mg / m3
And I found that 1 PPBV = 1 mg / m3
So that means 173 PPBV = 173 mg / m3
But thresholds say :
10 mg·m-3, for 8 h
30 mg·m-3, for 1 h
60 mg·m-3, for 30 min
100 mg·m-3, for 15 min
So 173 PPBV = 173 mg / m3 is much above the thresholds. Something is wrong with my result. Anyone could help about that? I may have missed something...