Living on Earth: GELLERMAN: It’s Living on Earth, I’m Bruce Gellerman. The Secretary of the Interior has authority over more than a fifth of the land in the United States and more than three times as much area off our shores. That responsibility now rests with Ken Salazar. A former rancher and environmental lawyer, Salazar served as a Senator from Colorado before taking the reins as the nation’s biggest landlord. Living on Earth’s Ingrid Lobet has this profile of the new …