President Donald Trump’s Environmental Protection Agency is considering rescinding California’s permission to tackle climate change through stringent automobile pollution limits, the administration said in a US Supreme Court filing.

The California Air Resources Board said Tuesday it withdrew its requests for federal approval to implement stricter emissions rules for locomotives and semi-trucks because the U.S. Environmental Protection Agency had yet to approve them. The decision came ...

Toxic smoke and dangerous particulate pollution are spreading far beyond the flames, leaving air quality at unhealthy levels in multiple counties.

President-elect Donald J. Trump has threatened to revoke or challenge all zero-emission vehicle rules and California’s other clean-air standards. By withdrawing its requests for U.S. Environmental Protection Agency approval, the Newsom administration is ...

The waiver allowed California to enforce its Advanced Clean Car program that requires auto makers to produce more zero-emmission vehicles through the 2025 model year. The EPA revoked the waiver during President Trump’s first term. It was reinstated after President Biden took office.

As wildfires continue to spread in southern California, misinformation about the response to the fires have cropped up online. Here are 5 claims debunked.

While we are disappointed that U.S. EPA was unable to act on all the requests in time," a state official said.

The state withdrew its pioneering clean air regulations for diesel trucks and trains, acknowledging they wouldn’t win federal approval. The state intended to end sales of trucks powered by fossil fuels by 2036.

President Trump has issued a directive calling for 'putting people over fish' in California water policy. State officials say it could prove harmful for water supplies and fish.

California derailed its rule that would have likely killed plans for Burlington Northern Santa Fe’s $1.5 billion Barstow International Gateway project.

In the aftermath of the Southern California wildfires, health experts are warning residents about the possible dangers of toxins still lingering in the air. Ash, smoke and other chemicals can easily seep into homes and buildings,

Nebraska Attorney General Mike Hilgers declared victory Tuesday in his fight with California over electric trucks.