Air quality alerts have been issued across most of the Midwest, and hundreds of wildfires are burning across Canada.

Minneapolis faced hazardous air quality, ranking second-worst globally due to Canadian wildfire smoke. Air quality alerts ...

"The air quality is officially dangerous in Chicago," says Brian Urbaszewski, director of environmental health programs at ...

Chicago's air quality drops sharply due to Canadian wildfire smoke, with the city recording the worst levels globally, ...

New studies from Germany and Hong Kong pinpoint specific sources of light pollution keeping our cities excessively bright at ...

Environmental activists, community members and local leaders on Thursday gathered in Southwest Detroit to speak out against ...

Air pollution maps depicting the dramatic fall in pollution levels in Paris after the city restricted car traffic has gone viral on social media. The image shows the pollution levels in the French ...

Doctors and researchers highlight multiple factors fuelling the crisis — exposure to second-hand smoke, vehicular and ...