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

California Gov. Gavin Newsom and environmental groups condemned a resolution headed to President Donald Trump that, if signed, would block the state’s authority to set stricter air standards and phase ...

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

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

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

After the GOP-led House ignored rules to revoke the Golden State’s authority to implement the nation’s toughest vehicle ...

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 ...

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 ...

T here’s so many extremist happenings in Washington right now that it’s easy to miss historic developments in the fog of ...

How Southern California Wildfires Impact Air Quality, Smoke Damage, and Insurance Coverage - The Southern California ...

Lawmakers in Washington are moving to block a landmark California law that would have banned the sale of petrol-only cars in ...