Experts say the EPA's move to reverse the endangerment finding is dangerous for the nation. But California may have tools to ...

EPA rollback of climate rules could weaken California’s clean air authority and trigger legal battles over greenhouse gas ...

California and environmental groups fiercely criticized the EPA's plans to undo the endangerment finding that enables ...

The long-expected move comes after Republicans recently disarmed fuel economy standards and canceled influential state-level ...

California's affordability crisis could lead to more relaxed emissions standards, according to a plan introduced by state ...

WATER WRANGLING: Colorado’s top negotiator in a dispute over the future of the West’s most important water source is warning ...

Revoking the 2009 endangerment finding would weaken regulation of greenhouse gases and shift more responsibility to states ...

The EPA’s plan to rescind greenhouse gas emissions rules is winning trucking industry support but sparking environmental backlash — and raising questions for early-adopter fleets that have already ...

Limiting trucks to no more than 65 mph nationally might have saved lives and fuel costs, but Trump regulators say it would ...

The proposal regards a previously submitted smog control plan for the San Joaquin Valley, which has long had some of the nation’s dirtiest air.