Last week, the Senate confirmed former Oklahoma Attorney General Scott Pruitt to run the Environmental Protection Agency, an agency he holds in contempt and sued more than a dozen times in his last job. Now, an Oregon environmental group is borrowing a page from Pruitt’s playbook and suing his agency for inaction.

On Thursday, Columbia Riverkeeper and several other regional organizations filed a lawsuit demanding the EPA act under the Clean Water Act to protect salmon from exceptionally high water temperatures in the summer. It is believed to be the first new lawsuit against Pruitt since he became EPA administrator.

Filed in federal court in Seattle, the suit would force the agency to write “a plan to keep the rivers cool enough for salmon and steelhead in the face of global warming.”

Pruitt’s reluctance to accept the reality of climate change is one of the main concerns environmental groups have about his tenure.

According to the suit, in 2003 the EPA concluded that the dams on the rivers create shallow reservoirs that heat up in the summer, leading to unusually high temperatures. In the summer of 2015, an estimated 250,000 adult sockeye salmon died while migrating up the Columbia and Snake Rivers due to the effects of the warm water.

In response to the 2015 fish deaths, the EPA stated that “the need to lower water temperatures becomes more critical as the Pacific Northwest Region continues to address…climate change.”