California’s changing climate has pushed fire season to new lengths, triggering once-rare winter blackouts.

The attorneys general of California and Massachusetts on the final full day of President Donald J. Trump’s administration filed a lawsuit in federal court to challenge the implementation of two recent rules defining the critical habitat for endangered species.

The Trump administration has exempted more oil refineries from biofuel-blending requirements, with a last-minute move set to draw the ire of ethanol and biodiesel producers.

A slew of top state attorneys general unleashed a spate of last-minute lawsuits against Trump administration environmental actions, including standards on toxic air controls and carbon emissions.

Superior Energy Services Inc. won bankruptcy court approval of its Chapter 11 plan, defeating several energy companies’ objections that the company was “gerrymandering” their claims.

Interior Secretary David Bernhardt said he expects both political and legal constraints to get in the way of President-elect Joe Biden’s pledges to block new oil and gas permitting on federal land.

Multiyear setbacks in completing certain EPA chemical analyses are delaying needed health protections, a federal watchdog report said Tuesday.

The Trump administration has formally issued nine oil leases in the Arctic National Wildlife Refuge, a move that complicates President-elect Joe Biden’s promise to permanently protect the territory.

Environmental groups are challenging the EPA’s decisions to approve changes to Ohio and Utah’s air quality plans, under two petitions filed in federal appeals courts Tuesday.

Oregon Department of Environmental Quality didn’t waive its authority to issue a water certification for the Jordan Cove LNG export project, the Federal Energy Regulatory Commission said Tuesday.