Jonathon's comment re: Air Quality Inside

[bbarrera]

The PurpleAir monitors received good ratings from a site I mention in this post:

Leadville Champion, Air Quality, Strengths vs. Weaknesses, and More – Ask a Cycling Coach 322

I found some information from here: There are some really poor devices out there (R^2 = 1 is best). and randomly found this more interesting overview (with pricing):

Wildfire smoke generates a lot of PM2.5.