[Projectiboga]

This suggests otherwise, https://radwatch.berkeley.edu/background-radiation/ Another exposure increase is from increased home insulation likely increases radon exposure.

[jandrewrogers]

That link suggests nothing of the sort. That aside, I’ve been tracking background radiation for years with my own sensors (for other reasons). I can’t replicate this claim there either, as expected.

[ianburrell]

That doesn't talk about an increase in radiation. If there was an issue, we would see it in flight crew. There is also a difference with altitude and soil composition, and that would show up in the data.