"MEMPHIS, Tenn. -- Nearly 100 boats and barges were waiting for passage Monday along an 11-mile stretch of the Mississippi River that has been closed due to low water levels, the U.S. Coast Guard said."

"Southern California Edison announced plans to cut nearly one-third of its workforce at the troubled San Onofre nuclear plant, raising new questions about whether the plant will ever return to full operations."

"What do the energy and environment policies of President Obama and presumptive GOP nominee Mitt Romney bode for the country?"

"RICHMOND -- The chairman of the U.S. Chemical Safety Board toured the scene of the Chevron refinery fire Monday and released photos of the gigantic vapor cloud that loomed over Richmond before it caught fire."

"MANTON, Calif. — Aided by a shift in wind direction, firefighters made a stand against a huge lightning-sparked wildfire burning on the edge of three small Northern California towns."

"Royal Dutch Shell is spending billions of dollars to drill the first oil wells in U.S. Arctic waters in 20 years, backed by an Obama administration eager to show it wasn't opposed to offshore exploration. But the closely watched project isn't going the way the company or the government hoped—illustrating the continuing challenge of plumbing for natural riches in one of the world's most unforgiving locations."

"AZTEC, N.M. — The land is parched, the fields are withering and thousands of the nation’s horses are being left to fend for themselves on the dried range, abandoned by people who can no longer afford to feed them."

"ABOARD THE DREDGE POTTER, on the Mississippi River — This ship is making sure that the Big River, shrinking under one of the worst droughts in modern history, stays deep enough."

"A retired aerospace executive - appointed to review a study on hydraulic fracturing after it was disclosed the study's author has strong industry ties - has such ties himself."

"Beside Seattle’s notoriously polluted Duwamish River, an excavator scoops up small pieces of waste metal and slings them onto a rusty mountain at Seattle Iron & Metals Corp. A pile of flattened cars and trucks squats nearby amid vast sheets of scrap metal. For at least the last four years, this auto-shredder and metal recycler has dumped more pollutants into the river than allowed under the federal Clean Water Act, government records show. The levels have ranged higher than 250 times above what’s known to harm salmon that migrate through the river."