B
And, uh,
A
But, I mean, you think about it, it, you know, it's probably a lot easier to detect things that go into the ground than it is maybe to just, I'm not really sure but I would think it would be easier to detect those things because you could detect them down strean-, or stream or such,
B
Yeah.
A
or you can, you can, you know, do, uh, testing on the ground itself at that point,
B
Uh-huh.
A
but when they pollute into the air and you've got, you know, and you've got movement through the air, it's going to move a lot of that off. So, I don't see, you know, how they can do some of the te-, unless it just hangs there like in places where it's a lot of pollution, you know, like in Los Angeles or, or the bigger cities where it, it tends to get stuck there,