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marble falls

(71,396 posts)
Tue Dec 2, 2025, 10:18 AM Dec 2

Thousands Urged To Stay Inside In Oregon

Thousands Urged To Stay Inside In Oregon

By Amanda Greenwood

https://www.newsweek.com/thousands-urged-stay-inside-oregon-air-pollution-epa-ozone-11139198

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The map showed an area of fine particle (PM2.5) pollution in the "unhealthy" Air Quality Index (AQI) category around La Pine in Deschutes County, and John Day in Grant County as of 2.45 a.m. ET.

PM2.5 are tiny particles of pollution that are usually 2.5 micrometers or less in size—roughly 30 times smaller than a strand of hair—that enter the atmosphere and are often unknowingly inhaled. They can come from various sources, ranging from construction sites and wildfires, to power plants and car emissions.


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A man crosses a street in Portland, Oregon, amid hazy weather conditions in 2020. (ROBYN BECK/AFP/Getty Images) | Photo by ROBYN BECK/AFP via Getty Images

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marble falls

(71,396 posts)
2. Maybe a confluence of temp, an inversion, holiday traffic and powerplants producing for the cold season ...
Tue Dec 2, 2025, 11:00 AM
Dec 2

... and AI.

maxsolomon

(38,393 posts)
11. Inversions trap air in valleys; the smoke builds up.
Tue Dec 2, 2025, 02:21 PM
Dec 2

Wood burning stoves, vehicle exhaust can do it. Places like Missoula are notorious for crap air from them.

maxsolomon

(38,393 posts)
10. Definitely possible.
Tue Dec 2, 2025, 02:19 PM
Dec 2

Newsweek is also understaffed and lazy, so they just pulled a stock picture of "Bad Air - Oregon".

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