Development plans threaten the rim of the Grand Canyon.

A new study overturns conventional ideas about wolf management and predation.

"In a major bipartisan breakthrough, House and Senate lawmakers last night successfully attached a slew of public lands and energy bills to the defense authorization bill that Congress hopes to pass in the coming week."

"Federal regulators have been too slow and lax when it comes to ensuring the safety of California's last operating nuclear plant, according to Democratic Sen. Barbara Boxer, who clashed repeatedly with members of the Nuclear Regulatory Commission during a Senate committee hearing Wednesday."

"When Republicans take control of both houses of Congress next month, President Barack Obama will be hard-pressed to cut U.S. greenhouse gas emissions dramatically — a promise he made to Americans and the world and a key to his legacy."

"NEW YORK — Steps that President Barack Obama has taken to help the environment must be protected, former Secretary of State Hillary Rodham Clinton said, but she avoided the contentious issue of the Keystone XL pipeline in remarks to a group that vigorously opposes it."

"The Atlantic bluefin tuna gained protections from overfishing in the Gulf of Mexico and the waters off North Carolina under a federal rule published on Tuesday to better regulate a species coveted by sushi lovers."

"The West's leading trade group for the oil industry has collaborated with, and in some cases funded, an array of groups to combat what it calls "aggressive anti-oil initiatives," according to a presentation obtained by climate activists and shared with the San Jose Mercury News."

"The corporate lobbying network American Legislative Exchange Council, commonly known as Alec, is planning a new onslaught on a number of environmental protections next year when Republicans take control of Congress and a number of state legislatures."

"Plunging oil prices sparked a drop of almost 40 percent in new well permits issued across the United States in November, in a sudden pause in the growth of the U.S. shale oil and gas boom that started around 2007."