[DominikD]

They aren't just passing by. There's an ongoing fight for the control over this terrain. And, in the unlikely event of Russian troops retreating, I wouldn't put past Russia bombing it.

[jack_pp]

Considering the whole reason for this crisis is Russia's proximity to Ukraine, wouldn't that mean contamination spreading to Russia too?

[DominikD]

Wind in this area is primarily a westward one.