"A shipment of bomb-grade uranium arrived at a secure facility in Russia Monday, sent from a research reactor in Poland as part of a race to secure dangerous radioactive material around the world. There was no way to mistake the shipment for something innocuous like Polish sausage — the trucks were escorted by heavily armed police officers and plastered with large radioactive signs."

"Workers raced to build an emergency dam in western Hungary on Sunday as cracks in a reservoir widened, threatening to unleash a second torrent of toxic sludge on the village of Kolontar and nearby rivers."

Plans for one of the first new nuclear power reactors in decades -- a third unit at Calvert Cliffs, Maryland, were put on hold by Constellation Energy. The Energy Department said the project is so risky that Constellation must pay high fees if it wants the U.S. taxpayers to guarantee construction loans. But those subsidies were not high enough for Constellation. The demise of its poster child raised questions about the so-called "nuclear renaissance."

"Environmental campaigners planted trees, collected rubbish and rallied against pollution on Sunday for what organisers aimed to make the world's biggest day of climate-change activism."

"World leaders have snubbed the next round of international climate change negotiations in Mexico next month amid fears the talks will collapse."

"The Department of Energy and Washington State Department of Ecology have reached agreement on a consent decree that sets new court-enforced deadlines for emptying Hanford tanks of radioactive waste and treating the waste."

"Four environmental advocacy groups said Thursday that they have found widespread fraud in water pollution discharge monitoring by two of Kentucky's coal companies."

"The White House is pushing back against the draft reports the National Oil Spill Commission released Wednesday  on the Deepwater Horizon oil spill that included scathing criticism of the administration's handling of the disaster. The reports' harshest criticism was directed toward the administration's handling of information about the size of the spill and the extent of the damage."

"A coalition of elected officials and unions called on Thursday for faster action from the city and federal government to monitor and, if necessary, remove hazardous chemicals known as PCBs from as many as 700 city schools, calling the problem a 'serious health threat.'"

"California voters are remaining true to one stereotype -- their commitment to the environment. A measure to suspend the state's vanguard climate change law is heading for failure, by a margin of 49 percent to 37 percent, because voters see the law doing more economic good than harm, a Reuters/Ipsos poll released on Tuesday showed."