Image via Shutterstock Officials are issuing a public health warning in one major American city over the quality of the air.

The agency says air quality is expected to reach the orange Air Quality Index (AQI) category, which is unhealthy for sensitive groups.

How is air quality across the U.S. these days? —Paul Jackson, Washington, DC. Air quality is defined as the degree to whi ...

Elevated to critical fire danger along with worsening air quality will be the primary concern Monday afternoon. Please do not ...

Teams of experts at Air Quality keep a network of statewide air monitors running smoothly year-round, which helps inform the ...

Dhaka, the overcrowded capital city of Bangladesh, has ranked 15th on the list of cities with the worst air quality with an ...

Dhaka, the overcrowded capital city of Bangladesh, has ranked seventh on the list of cities with the worst air quality with ...

An Air Quality Alert has been issued for portions of western and central Minnesota on Monday, including Cass and Crow Wing ...