"BAGHDAD — The crisis gripping Iraq escalated rapidly on Thursday with a re-energized Islamic State in Iraq and Syria storming new towns in the north and seizing a strategic dam as Iraq’s most formidable military force, the Kurdish pesh merga, was routed in the face of the onslaught."

"With the removal of many dams, conservationists are seeing the return of the natural bounty that fed Native Americans and astonished European settlers."

"Pennsylvania has 86,000 miles of rivers, streams and creeks — a total length eclipsed only by the vast wilderness in Alaska."

"New herds of genetically pure wild bison may once again roam vast expanses of the American West where the iconic animal has been absent since the end of the 19th century, under a tentative plan federal officials advanced on Wednesday."

"Two years ago, Bill Orem and his team of researchers were setting up air monitors in the yards and on the porches of residents in Artie, a small Raleigh County community surrounded by mountaintop removal mines."

"For years, the U.S. Environmental Protection Agency has been frustrated in its efforts to pursue hundreds of cases of water pollution — repeatedly tied up in legal fights about exactly what bodies of water it has the authority to monitor and protect. Efforts in Congress to clarify the EPA's powers have been defeated. And two Supreme Court decisions have done little to decide the question."

"Belize has made a great effort to protect its coral reef system — the largest in the Western Hemisphere — by establishing more than a dozen protected areas. But patrolling large stretches of ocean and coastline and enforcing fishing regulations takes time, people and boats. Or drones."

"The U.S. Environmental Protection Agency on Friday said it intends to take extraordinary action to protect Bristol Bay’s world-class salmon runs and unparalleled natural habitat from destruction by the proposed Pebble mine. But the agency is stopping short of blocking the mine outright and instead is proposing caps on how many miles of streams and acres of wetlands could be lost."