Pombo's home town of Tracy is close to a large wind farm on Altamont Pass. In 2004, Pombo's office sent a letter to then-Secretary of the Department of the Interior Gale Norton, urging the suspension of environmental guidelines opposed by the wind power industry. Pombo's parents have received hundreds of thousands of dollars in royalties from wind-powered turbines on their ranch. Pombo owns an interest in his parents' ranch.