As Trump pledges regulatory rollbacks, environmental groups say the administration’s aggressive cost-cutting tactics could make it easier for them to win some long-term battles.

© Mark Abramson for The New York Times

What the economics of coal-rich states like Wyoming tells us about the transition away from the dirtiest fossil fuel.

© Benjamin Rasmussen for The New York Times

President Trump’s tariffs could threaten supply chains in the renewable energy industry and disrupt oil and gas markets.

© The New York Times

A spokeswoman for the agency said the change was “common practice.” Others said it injects partisanship into jobs that have always been neutral.

© Joshua A. Bicket/Associated Press

A spokeswoman for Lee Zeldin, the new head of the agency, said the goal was to create an “effective and efficient” federal work force.

© Eric Lee/The New York Times