Major air pollutants have declined in recent decades, but USA TODAY’s analysis shows wildfire smoke is taking their place.

AirNow is a collaborative effort of federal agencies that provides air quality data across the U.S. The site also has ...

A map from AirNow suggests that the air quality around Los Angeles and Anaheim, California, is unhealthy as the Palisades ...

Already known for having some of the worst air quality in the U.S., people in Southern California are now also at risk of ...

Air quality across parts of California is deteriorating to hazardous levels as strong winds drive rapid wildfire spread and ...

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

Wildfire smoke increases tiny particles in the air known as particulate matter that can be harmful to people’s health.

Dhaka's air quality ranked the 11th worst globally on Saturday as the city continued to grapple with “unhealthy” pollution ...

Good (Green): 0-50 AQI means there is little or no health risk associated with air quality. Moderate (Yellow): 51-100 AQI ...

The air was classified as unhealthy, referring to a health risk, according to the AQI index. When the AQI value for particle pollution is between 50 and 100, air quality is considered ‘moderate’, ...

If you smell smoke in the air, you're not alone. Here's how New Year's Eve festivities can impact air quality.

The air quality in the Philippines’ capital city has reached an “unhealthy” level on New Year’s Day due to air pollution, ...