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.

State regulators said the measures would probably have been rejected by the Trump administration and that they would focus on homegrown legal strategies instead.

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 ...

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 ...

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

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,

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

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 Donald Trump may visit California this week as state Attorney General Rob Bonta begins filing expected lawsuits against the president's new executive orders.

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

California sued Donald Trump 123 times during his first presidency. Trump lost about two-thirds of cases filed against his administration, but that doesn’t guarantee the same results this time around.

California is walking back its efforts to ban diesel trucks in the state just days before President-elect Donald Trump returns to the White House.