"The Transportation Security Administration announced Friday that it would retest every full-body X-ray scanner that emits ionizing radiation — 247 machines at 38 airports — after maintenance records on some of the devices showed radiation levels 10 times higher than expected."

"So many people surged to the West Coast and Alaska Tsunami Warning Center website that it slowed to a crawl early Friday, unable to provide critical information to the public about the coastal impact in the U.S. of a massive earthquake in Japan."

"The official announcement that two reactors at an earthquake-damaged nuclear plant could be suffering meltdowns underscores the Japanese nuclear industry’s troubled history, and years of grass-roots objections from a people uniquely sensitive to the ravages of nuclear destruction."

"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."

"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."