the fog particles could be nano-microchips sprayed from drones and planes  maybe the same thing that is in the vax but in numbers orders of magnitude higher, like they have some underground city that has been producing these by the ton and now spraying them around the world. darpa smart dust and 5-g towers collect and upload the data to a quantum ai computer and builds a virtual world and all smart dust forms a "negative" of the physical world so its perfect replica that they digitize for the ai brain replica which they have been building too.  the dust is everywhere, animals have it in them, wind currents, even bugs carry it. the ai now can see the entire planet and connect through 5g towers to every living thing, manipulate through weather modification and space lasers etc.
United States