Alaska Wilderness League v. U.S. EPA

In this case, the Ninth Circuit deferred to the EPA’s interpretation of a statute concerning whether increment requirements were applicable to a temporary source pollutant. The court held that Shell Offshore, Inc. was not required to analyze the potential impact of an offshore drill barge, the Kulluk, under the Clean Air Act. Additionally, the plaintiffs’ challenge concerning the Kulluk's impact on ambient air was defeated pursuant to Resisting Environmental Destruction on Indigenous Lands, REDOIL v. EPA.