Happy City Index ranks cities based on the happiness of their citizens. These are the 20 cities that ranked highest.

Researchers from several University of California campuses have collaborated to create a report on dust in California, a ...

Out of the California cities that ranked the worst for ozone and particle pollution in 2025, the Fresno and Sacramento ...

Reno and other Nevada cities ranked worse than Los Angeles for air pollution, according to the American Lung Association’s ...

Bay Area's air quality struggles despite green reputation, with high ozone and particle pollution impacting health, ...

The wildfire in New Jersey had ravaged more than 15,000 acres and was just 50% contained as of Thursday night.

An air quality alert is in place for parts of Southern California on Thursday as windblown dust creates hazardous conditions.

Several U.S. cities are experiencing heightened air pollution levels on Wednesday, including parts of Chicago.