chimney-smokeWood Stove owners in the Eugene-Springfield area have been pouring on the fuel during a cold snap, and air-quality regulators say a buildup of pollution means the burning has to be curbed. A ban on visible chimney smoke could last through Sunday, when warmer weather is expected. The Eugene Register-Guard reports such bans may become more frequent because federal standards on particulate pollution have been tightened. The Lane Regional Air Protection Agency imposed a ban in the mountain town Oakridge on Wednesday. More