Seismic waves from earthquakes have always offered a window into Earth’s hidden interior. For decades, researchers believed ...

The Portland metro area lands in the middle of the pack for ozone pollution, according to a new report from the American Lung ...

Nearly half of Americans in the U.S. live in areas with failing air quality, according to the American Lung Association’s ...

Arizona’s air is getting cleaner—but not clean enough. A new report from the American Lung Association shows some wins for ...