Remember the crazy story that Russia was using mobile crematoriums to dispose of dead soldiers?
What if they are actually being used to incinerate viruses/other things being taken from the BioLabs?
https://nypost.com/2022/02/24/russia-has-mobile-crematoriums-that-evaporate-the-dead-report/
,,,this is what is going on concerning your observation....
...you are on the right track, but you need to think "bigger"....
https://armscontrolcenter.org/fact-sheet-russias-use-of-thermobaric-weapons-in-ukraine/
So you think they are getting rid of the thermobaric weapons?
...the Russians were using the "vacuum bombs" to destroy the biological material in the captured laboratories...
...extreme heat will incinerate pathogens....
Interesting. So comms?
...just chatter....