The company, xAI, has installed several dozen turbines in Memphis without proper permits, the group said, polluting a nearby community.

© Karen Pulfer Focht, via Reuters

The Trump administration’s move sets back a decades-long effort to end the use of the material, which is widely banned in other countries.

© Mario Tama/Getty Images

The armored mammals are trafficked for their scales and meat.

© Themba Hadebe/Associated Press

Environmental groups had opposed expanding a Montana mine previously caught up in allegations of cocaine trafficking and the faked kidnapping of an executive.

© Louise Johns for The New York Times

Michael Boren, nominated by President Trump, is accused of threatening trail workers with a helicopter, building an airstrip without a permit and putting a cabin on federal property.

© Aaron Agosto for The New York Times