ALA 'State of the Air’ report finds U.S. ozone levels falling, PM2.5 rising

The American Lung Association’s (ALA) annual “State of the Air” report shows a drop in unhealthy levels of ozone but also finds that levels of harmful fine particulate matter (PM2.5) are rising as a result of climate change-driven wildfires, with ALA saying the study shows a need for new federal policies to promote less-polluting energy sources. ALA’s report says “more than four in ten Americans (41.1%--more than 135 million Americans) are living in the 217 counties across the nation with...