Produced primarily by the burning of fossil fuels, ammonium nitrate is a substantial portion of particulate pollution, a ...

The Republican-majority Senate's decision to revoke California's planned ban on vehicles that run on fossil fuels defies ...

California has used federal waivers to help clean up its air quality for decades. The U.S. Senate will likely revoke that ...

Amid a heat wave, some Southern California residents are expected to experience potentially dangerous air quality on Tuesday.

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 ...

California officials announced their intentions on Thursday to file their 23rd lawsuit against the Trump administration — this time, over an attempt to upend the state’s stricter-than ...

Republicans used a procedural tactic to counter Democratic accusations they were gutting the filibuster and lay the ...

Air pollution levels considered ‘safe’ for farmworkers provide inadequate protection from health risks and injuries, a new ...

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 ...

A controversial senate vote on Thursday could impact Tesla’s ability to generate hundreds of millions of dollars per quarter ...

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

I am alarmed that California's clean-air standards face threats from Senate Republicans, risking American innovation in electric vehicles and global market competitiveness.