I've noticed the Oly air lately has a stagnant feel and smell to it, also that my lungs have been reacting, so I did some quick research and found some answers. I'll paste info (current today 1/24) from the good folks at the Olympic Region Clean Air Agency, follow link for the specifics on how to help us all breath better.

Because of concerns over degrading air quality, the Olympic Region Clean Air Agency has called a Stage 1 Burn Ban in Thurston Country, effective immediately.

Under a Stage 1 Ban, residents are not allowed to use fireplaces or uncertified woodstoves, and all outdoor burning and land clearing burning is prohibited. Additionally, residents with certified woodstoves are asked to voluntarily refrain from using those devices until air quality improves – forecasts suggest that will occur over the weekend.

A system of stable, high pressure over Western Washington, coupled with overnight temperatures well below freezing, caused air pollution levels to climb. A change in weather will be needed to restore cleaner air quality, but the current weather pattern is expected to remain unchanged until Saturday at the earliest.