(Might be wrong flair) Smoke from smaller campfires, house fires, etc go away after a while. Even though there is so much more smoke from the wildfires, how is it still able to travel across multiple states without going away?
Edit: Dissipate, not dissappear
In: 33
Well it has to go somewhere, Earth is more or less a closed system.
Sufficiently large emissions of smoke and ash from volcanic activity or wildfires can dump so much material into the atmosphere that it circles the entire hemisphere. Eventually it will rain/settle out, but that can take weeks or months depending on the season and weather patterns.
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