Air quality alerts have been issued across 12 states for Wednesday, according to the National Weather Service.

Maine's air quality continues to suffer from lingering Canadian wildfire smoke, so we asked a health expert why exposure to ...

Wildfires produce harmful smoke that scientists say has contributed to thousands of deaths across the U.S. Washington is ...

Antonella Zanobetti was conducting groundbreaking research to examine links between exposure to environmental factors, such as pollution and heat, and deadly neurological and cardiovascular diseases.

Wildfire smoke from Canada has prompted officials to place the Lehigh Valley and surrounding counties under an air quality ...

Particle size also comes into play, with particulate matter 2.5 µm in diameter or smaller (PM 2.5) causing greater harm.

Particulate matter, or particle pollution, is the mix of solid and liquid droplets floating in the air, according to the Environmental Protection Agency. It can come in the form of dirt, dust ...

The Pennsylvania Department of Environmental Protection (DEP) says there will be a Code Orange Air Quality Action Day on ...