The Bay Area Air Quality Management District is calling all ye Bay Area residents to spare the air tonight by refraining from lighting a fire or using other wood burning appliances. (Does that mean no Duraflames, you ask? Yes. Yes, it does.)

The morning forecast, it seems, predicted unhealthy PM (particulate matter) concentrations. And we have no idea what that means exactly.

But in lieu of a cozy fire, we suggest putting on the Yule Log DVD with the sound off -- it plays choice X-mas music, which isn't at all fitting. Yet -- and cranking up the heater.