Blech, paper mills. I would visit my older brother when I was younger in Tacoma, and to me the whole city smelled like "the valley." (I grew up in the country, and driving places you had to pass cow farms. Ick.)
Yeah, LA, China, CanRay's stuff... super super wierd. I quoted some of the stories here to my girlfriend last night, and she had a full wtf double take. And she grew up in a city (Bellevue).
For non Washingtonian folks, we talk about the weather being nice when "the mountain is out." (Or the sun, but that's a different story.) Where alot of places that would be a smog reference, for us it's just because normally the clouds don't let you see very far.

"You might be from Washington...
If you know the term 'Sun Break,' and can use it in a sentense.
If you consider a floating bridge a pain in the arse, and not a engeneering marvel.
If you hate California for messing up your taffic, destroying manners, and making people rude."