Legal experts say California could go it alone if the federal government stops regulating greenhouse gases. One reason to try ...

The backstory: Cars and trucks represent more than a third of California’s greenhouse gas emissions. The Trump administration ...

California regulators and solar industry stakeholders are denouncing the U.S. Environmental Protection Agency's decision to eliminate the Solar for All grant program, designed to bring solar energy to ...

WASHINGTON (Reuters) -Attorneys general from California and several other U.S. states led by Democrats on Tuesday urged President Donald Trump's administration to abandon its plan to rescind the ...

The Environmental Protection Agency has moved to block a California regulation aimed at reducing emissions from diesel trucks, arguing that it serves as a backdoor emission rule that would be imposed ...