An annual report from the American Lung Assn. showed that Los Angeles has improved its air quality but still deserves its ...

The American Lung Association released on April 23 its 26th “State of the Air” report that shows that California’s clean air ...

How bad is air pollution in California? Five California cities ranked among the 10 most polluted metropolitan areas in the United States in the United States, in the latest American Lung Association’s ...

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

LOS ANGELES ... unhealthy levels of air pollution, with 156 million people living in regions that received "F" grades for either smog or particle pollution. Los Angeles-Long Beach was found ...

Los Angeles ranked first for most polluted by ozone. Smog, technically known as ozone air pollution ... said in an interview. Transportation is one of the main sources of pollution in the Chicago ...

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

LOS ANGELES — Despite decades of progress in reducing air pollution ... and cleaner car engines have significantly reduced pollution, transportation remains the largest source in California ...