Energy Transfer, which owns the Dakota Access Pipeline, is seeking $300 million, a sum that Greenpeace says could bankrupt the storied environmental group.

The case is tied to protests in 2016 and 2017 of the Dakota Access Pipeline and its controversial Missouri River crossing upstream of the Standing Rock Sioux Tribe’s reservation. The tribe has long opposed the pipeline as a risk to its water supply. The pipeline was completed in 2017.

Jury selection just began for a lawsuit filed against Greenpeace in Morton County, North Dakota, kicking off a trial for a grievance that began nearly a decade ago. Environmentalists say the $300 million lawsuit filed by a pipeline company is an attack on First Amendment rights.