A coalition of conservation groups sued the Trump Administration over using an Executive Order to open up for oil drilling in the Arctic and Atlantic oceans.
In 2019 the U.S. District Court for the District of Alaska ruled in their favor saying the order was unlawful. The Trump administration soon appealed the ruling.
On President Biden's first day in office, the Executive Order was revoked, leaving the case "moot".
The Ninth Circuit Court of Appeals on Tuesday agreed to dismiss the Trump administration's appeal.
"We lack jurisdiction to consider ‘moot questions...or to declare principles or rules of law which cannot affect the matter in issue in the case before [us],'" the court said Tuesday.
“Because the terms of the challenged Executive Order are no longer in effect, the relevant areas of the [Outer Continental Shelf] in the Chukchi Sea, Beaufort Sea, and the Atlantic Ocean will be withdrawn from exploration and development activities,” the court said.