The Texas-based energy company TXU was, under the Bush administration, supposed to be the cutting edge of a coal resurgence. The 2007 leveraged buyout of TXU is widely regarded to be one of the worst deals in private equity history. But the firms that led it -- KKR, TPG, and Goldman Sachs -- made money with big fees even as the company tumbled toward financial ruin.

"SHIPPINGPORT, Pa. -- Chesapeake Energy has a permit to frack just one mile from the Beaver Valley Nuclear Power Station in Shippingport. Whether that is cause for alarm, experts can’t say."

"MADRID -- Farmers drilling ever deeper wells over decades to water their crops likely contributed to a deadly earthquake in southern Spain last year, a new study suggests. The findings may add to concerns about the effects of new energy extraction and waste disposal technologies."

"An un-redacted version of a recently released Nuclear Regulatory Commission report highlights the threat that flooding poses to nuclear power plants located near large dams -- and suggests that the NRC has misled the public for years about the severity of the threat, according to engineers and nuclear safety advocates."

"BATON ROUGE -- About 565,000 pounds of oiled material from the Deepwater Horizon spill was brought to the surface by Hurricane Isaac, more than had been collected in eight months before the storm, the state's coastal protection agency said Wednesday. The post-storm figures were announced as members of the state's Coastal Protection and Restoration Authority sharply criticized continuing clean-up efforts by BP and the U.S. Coast Guard and called for more resources to deal with oil that is still below the surface of the gulf, an amount believed to be equal to about 1 million barrels."

"TULSA, Okla. -- A massive dust storm swirling reddish-brown clouds over northern Oklahoma triggered a multi-vehicle accident along a major interstate Thursday, forcing police to shut down the heavily traveled roadway amid near blackout conditions."

"Climate change contributed to a fivefold increase in weather-related natural disasters in North America over the past three decades, according to Munich Re, the world’s biggest reinsurer."

"The Nuclear Regulatory Commission said its latest analysis of seismic faults near PG&E Corp's Diablo Canyon nuclear station in California showed the coastal plant could withstand an earthquake generated by an offshore fault identified in 2008, according to a statement on Friday."

Scientists have disagreed about whether global warming is causing hurricanes to be more frequent and powerful. Now a study using a new measuring technique, published in a major peer-reviewed journal, has produced a longer historical data record that authors say shows the connection.

"A photojournalist charters a flight to see just how close Shell's offshore rig is to the protected Arctic National Wildlife Refuge. Turns out a photo is worth a lot more than a bunch of GPS coordinates."