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 ...

Douglas McIntyre, Editor-in-Chief at Climate Crisis 24/7, reports on new findings from the American Lung Association showing ...

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.

Air quality alerts were issued across two counties in Southern California on Friday amid harmful pollution levels.

Air dispersion modelling is a method of predicting the ground level concentration of one or more sources of air pollutants. Ground level ambient concentrations of pollutants are predicted using ...

Purchase the City’s digital and published maps and data such as high-resolution orthoimagery, topographic mapping, parcel mapping, individual ward maps, elevation data and more. The City of Toronto’s ...

Part of the payoff has been invisible — in the air itself. Airparif, an independent group that tracks air quality for France ... Air pollution heat maps show the levels of 20 years ago as ...

The Environmental Protection Agency's Air Quality Index (AQI) map for Thursday displays a ... or Unhealthy for Sensitive Groups, as are the California cities of Santa Clarita, Riverside, Ontario ...