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A comment on New research: natural gas appliances emit much more methane than realized. Parent comment

Re:New research: natural gas appliances emit much more metha... by heartbreak on Friday February 04, 2022 @04:07PM (#30213215)
The thread author appears to have mistaken the acceptable NO2 level for 5.3ppb when it’s actually 53ppb. The averages on his chart never met or exceeded that value.
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Re:New research: natural gas appliances emit much more metha... by BugsJustFindMe on Friday February 04, 2022 @04:36PM (#30213632)
The EPA current standard is 53ppb, but actually the WHO in September set their recommended AQG target at 10 micrograms per cubic meter with 3 step-down interim targets of 40,30,20.

10 micrograms per cubic meter of NO2 is 5.3ppb. (conversion factor is 1.88ugm3/1ppb)

You can read it here: https://apps.who.int/iris/handle/10665/345329

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Re:New research: natural gas appliances emit much more metha... by heartbreak on Saturday February 05, 2022 @08:48AM (#30220936)
Is the WHO value for indoor air quality? Why would WHO and EPA deviate by an order of magnitude?
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Re:New research: natural gas appliances emit much more metha... by BugsJustFindMe on Saturday February 05, 2022 @03:36PM (#30225686)
The EPA value is a limit for today. The WHO value is a recommendation for the future target after some industry accommodation period.

Essentially "what it is" vs "what it should be".

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Re:New research: natural gas appliances emit much more metha... by dahfizz on Friday February 04, 2022 @04:30PM (#30213544)
Source? The closest I could find is [1], which says 10 μg/m3 annual mean and 25 μg/m3 24-hour mean. It is for outdoor levels, but I can't imagine why the same chemical would be safer to breathe depending on whether you are inside or not as you breathe it.

[1] https://www.who.int/news-room/fact-sheets/detail/ambient-(ou...

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