The administration urged a court to throw out a challenge brought by tribal and environmental groups, backing a pipeline that would carry Canadian oil across Minnesota and Wisconsin.

The Biden administration has defended a contentious pipeline project that would carry hundreds of thousands of barrels of oil through Minnesota’s delicate watersheds, urging in a court brief that a challenge brought by local tribes and environmental groups be thrown out.

The closely watched filing in federal court was the latest in a series of actions taken by the administration to back Trump-era approvals of oil and gas infrastructure, despite President Biden’s pledge to aggressively cut emissions from fossil fuels, a major driver of climate change. The pipeline, which is known as Line 3 and is being built by Canadian pipeline company Enbridge Energy, has been the focus of mass protests in recent weeks.