The 2009 finding under the Clean Air Act is the legal underpinning of a host of climate regulations for motor vehicles, power plants and other pollution sources.

The Times identified 45 people within the so-called Department of Government Efficiency, a group formed by Elon Musk that in a short few weeks has radically upended federal agencies.

From the column: "Federal support for science in Duluth has already been cut, and scientists and natural-resources managers ...

Leaders at a key US weather and science agency are compiling a list of employees who didn’t respond to an email asking them ...

The Trump administration's reported determination to overturn the EPA's 2009 endangerment finding on climate change would be ...