Proposed legislation hasn't moved out of the Assembly and Senate, raising questions about how far California will go in efforts to make oil and gas companies pay for climate damage.

At present there aren't any high-speed rail networks—defined by the International Union of Railways (UIC) as operating at a minimum of 250 kilometers per hour (155 miles per hour) along specially ...

The Trump administration's Environmental Protection Agency is taking aim at dozens of rules aimed at protecting the ...

Air quality regulators in Southern California have rejected rules that would have curbed harmful emissions from gas-powered ...