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This was at a stockpile yard at a port where raw mined materials were stored before being shipped.
Basically, if the wind was blowing strong enough in the right direction, it would blow over a nearby town. The problem wasn’t really knowing where the dust was going, but where it was coming from. Accurate monitoring could detect exactly which pile the dust is coming from, so you could direct all the water to the source. It’s impractical to wet the entire yard, as it’s huge.
I have configured my home router to redirect all plaintext DNS traffic through it. I did it because Chromecasts try to sidestep DNS and go straight to Google.
While doing that was a couple of lines of nftables config, blocking DoH would require an actively maintained list. Even then, it would be trivial to host your own by renting some server space.