S moke from burning landscapes—including wildfires, prescribed burns, and agricultural clearing—can raise concentrations of fine particulate matter (PM2.5) and other harmful air pollutants in areas hundreds or even thousands of miles from the epicenter of a blaze. 1,2 In a paper in this issue of EHP , researchers assessed landscape fires that occurred in Europe in 2005 and 2008, and estimated that the smoke they produced may have caused more than 2,500 premature deaths across more than two dozen countries. 3展开▼
