"In a high-stakes battle that pits gold and copper against fish, members of Congress are scrapping over a plan to build one of the world's largest open pit mines in southwest Alaska."

Hundreds of anti-fracking protestors rallied outside a Marcellus Shale industry conference in Philadelphia. Aubrey McClendon, the chief executive of Chesapeake Energy Co., called people concerned about the safety of their families' drinking water "extremists," even as an industry-friendly report noted that fracking could be costly to communities.

A group of nine Nobel Prize winners called on President Obama to reject the Keystone XL pipeline.

"MONUMENT VALLEY, Utah (AP) — The stretch of high desert on the Arizona-Utah border gives way to towering rock formations that resemble huge mittens, chimney spires and castles. But to the west of Monument Valley lies a reminder of what has been blamed for much heartache and tragedy in Elsie Mae Begay's family: A mesa stained with a gray streak where uranium was mined decades ago."

"South Florida’s lakes, marshes and rivers pump fresh, crystal clear water across the state like veins carry blood through the body. But cities along South Florida’s coast are running out of water as drinking wells are taken over by the sea."

Domestic drinking water wells in the region around Augusta, Maine, show levels of arsenic above EPA's new safety standards. Excess arsenic in drinking water can cause a range of serious health problems.

"President Barack Obama put a stop on Friday to new rules that would limit smog pollution, unexpectedly reversing course on a key policy measure after businesses said it would kill jobs and cost them billions of dollars."

"Chinese environmental groups accused Apple Inc. of turning a blind eye as its suppliers pollute the country, the latest criticism of the technology company's environmental record."

"Pennsylvania is one of only four states with regulations in place requiring drillers to disclose on a well-by-well basis the additives and chemicals used in fracturing fluid injected deep underground into oil and natural gas wells. But the state is the only one not to post the data on the Internet."

"The State Department gave a crucial green light on Friday to a proposed 1,711-mile pipeline that would carry heavy oil from oil sands in Canada across the Great Plains to terminals in Oklahoma and the Gulf Coast."