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

The Republican-majority Senate voted to nullify California's landmark environmental rule that would've banned the sale of new ...

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 ...

According to a notice published by the NWS, the South Coast Air Quality Management District (AQMD) issued an air quality alert due to "harmful" levels of particle pollution from windblown dust in the ...

Not only is California's phase-out of internal-combustion vehicles by 2035 in the crosshairs, its ability to set its own environmental standards is, too.

Opponents of California's waiver, which had been adopted by 11 other states and Washington, D.C., called it economically ...

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.

The Senate on Thursday blocked California's landmark mandate phasing out gas-powered cars, dealing a blow to the state's move ...

California Gov. Gavin Newsom (D) announced his intentions on Friday to help launch a multistate, clean car-focused coalition after the Senate voted to upend the Golden State’s ...

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 ...

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