Fire.

Here's the link to the actual site, but the jist of it is this: Russians burn everything. Kids play with matches out in the street, anything remotely flammable will fall prey to them. Grilling shashlik out in the woods, drop your coals into a pile of dry leaves, drive away (I am a witness). This sort of thing, multiplied over a large population, results in ... well, look at the picture. Hint: the red dots are forest fires visible from a satellite ...

But first, proof. Here's the smog, moving in. Then, satellite coverage. Then, Deanna and I walking home from school, with approaching smog. An hour after this, we couldn't see the buildings across the street.

Easter ... not for another month here. So, I've got nothin'.