The Trump administration says the cities shouldn’t be penalized for unhealthy air because pollution can blow in from abroad.

A new report from the American Lung Association finds about half of U.S. children are living in areas with unhealthy air ...

A new report from the American Lung Association revealed that two counties in the Inland Empire are the worst in the nation ...

Q: Our registration requires a smog test. My husband is immune-compromised. If we made a special request, would the DMV waive smog certifications during the quarantine? … We are seniors and don’t want ...

California lawmakers are advancing Senate Bill 1392, or “Leno’s Law,” which would phase in smog check exemptions for certain collector cars while keeping strict limits on their use. The proposal comes ...

Add Yahoo as a preferred source to see more of our stories on Google. Smog hangs in the air as the sun sets after a hot day in the Los Angeles Basin on Wednesday, Oct. 4, 2023. (Luis Sinco / Los ...

California is updating its smog check rules to require all OBD-II readiness monitors to be complete for most vehicles, with very limited exceptions. These monitors verify that emissions systems are ...

Ann Carlson, a UCLA law professor who served as acting administrator of the National Highway Traffic Safety Administration ...

Smog hangs in the air as the sun sets after a hot day in the Los Angeles Basin on Wednesday, Oct. 4, 2023. (Luis Sinco / Los Angeles Times) Federal prosecutors in Sacramento on Thursday unsealed an ...