At 8:26 a.m. on Friday, the NWS Phoenix AZ reported an air quality alert in effect until Sunday at noon. The alert is for ...

State and local authority over air quality will be jeopardized if Congress revokes California’s auto emissions limits, ...

There are 25 million more people living with bad air than last year's report showed, according to air quality data from the ...

On Tuesday at 7:30 a.m. an air quality alert was reported by the NWS Phoenix AZ in effect until Thursday at 11 a.m. The alert ...

California Air Resources Board said it would repeal its Advanced Clean Fleets rule, which required certain trucking fleets in the state to transition to zero-emission vehicles beginning last year.

Mark DeSaulnier, a California Democrat, called the Republicans’ attempt to use the CRA to kill California’s waivers ...

Before the EPA, the US environment was not federally protected. Vintage photos show Los Angeles before regulations limited ...

Read more on our AI policy here. On Tuesday at 7:30 a.m. an air quality alert was reported by the NWS Phoenix AZ in effect until Thursday at 11 a.m. The alert is for Imperial County Southwest ...