Click the photo to see how woodsmoke spreads during an inversion.

February 2012 Asthma Rates Due to Traffic Related Air Pollution Are Higher Than Expected...more Flying The Leaded Skies: Small Planes Still Pour Lead Into America's Air...more Worried about Air Pollution? Don't Hide Indoors...more Here's exactly how much you'll save doing laundry in cold water ...more 16,000 Washington Families Take Advantage Of Weatherization Assistance...more Avoiding a Train Wreck: Replacing Old Coal Plants with Energy Efficiency...more Intel, Kohl's, Walmart Lead EPA's Green Power Purchasers List...more CFL Killers...more Companies try to recycle all waste, send nothing to landfill...more 18 projects awarded funds for land, water conservation...more Should you feel guilty for buying your iPhone?...more Scientists say global warming 'solutions at hand': Cut soot, methane...more Olympic National Park glaciers are shrinking, study says...more Bagged greens: To wash or not to wash...more Depaving Portland: Will Your Driveway Be Next?...more California orders hike in number of super clean cars...more Gregoire says oil-refinery charge would aid transportation system...more To save $4 million a year, Portland proposes 'suspending' major street paving...more Cycle like the Danes to cut carbon emissions, says study...more Study: Man-made ocean acidity threatens sea life...more South Sounders create, use rain yards to harvest water ...more Wasting the Wastewater...more Report backs greater use of recycled wastewater...more