"A second explosion rocked a troubled nuclear power plant Monday, blowing the roof off a containment building but not harming the reactor, Japanese nuclear officials announced on public television. The explosion underscores the difficulties Japanese authorities are having in bringing several stricken reactors under control three days after a massive earthquake and a tsunami hit Japan’s northeast coast and shut down the electricity that runs the crucial cooling systems for reactors.

An explosion at a nuclear power plant in northern Japan on Saturday blew the roof off one building, brought down walls and caused a radiation leak of unspecified proportions, Japanese officials said, after Friday’s huge earthquake caused critical failures in the plant’s cooling system."

"A new study about the way oil from the BP Deepwater Horizon accident evaporated into the air confirms that cleanup workers were exposed to high levels of airborne pollution, and that the fumes also may have made their way onshore in Louisiana."

"The latest surge in oil prices may help the renewable energy industry reach a turning point after years of boom-and-bust cycles long dictated by the rise and fall in gas prices."

"Conservation groups are concerned that new National Forest Management planning rule announced by the Obama administration last month takes away the single most important measure to ensure wildlife protection afforded by the 1982 regulations they will replace."

"A Seattle-based seafood company that operates mostly in Alaska will pay $1.9 million in penalties as well as cleanup costs for the ammonia and other waste it discharged from its processing plant in the Aleutians."

"The U.S. solar power sector grew 67 percent in 2010 but still lagged European markets by a wide margin in installing solar systems, the industry's trade group said on Thursday."

"Republicans in the House of Representatives said on Thursday they would seek to combat rising oil and gasoline prices with a series of bills this year aimed at spurring domestic energy production."

"Light bulbs sparked heated discussions [Thursday] morning during a Senate legislative hearing on two energy efficiency bills."

"A report commissioned by the United States Navy concludes that climate change will pose profound challenges for the sea service in coming decades, including a need to secure Arctic shipping lanes, prepare for more frequent humanitarian missions and protect coastal installations from rising seas."