Unlike states or countries, outdoor air pollution has no boundaries. Bad outdoor air quality can have far-reaching health effects for you and your loved ones. From wildfires, to exhaust fumes from ...

The agency says the air quality alert will reach the maroon color - the worst quality of air possible - in the far northwest ...

In the U.S., one measure of outdoor air pollution is the Air Quality Index, or AQI which rates air conditions across the country based on concentrations of five major pollutants: ground-level ...

Outdoor air pollution from power plants, fires and cars continues to degrade human, animal and environmental health around the globe. New research shows that even pollution levels that are below ...

A UC Davis analysis of 40 empirical studies found that air pollution is associated with differences in children’s brains. (Getty Images) Outdoor air pollution from power plants, fires and cars ...