"The U.S. Environmental Protection Agency is overseeing an effort to determine the extent of contamination at a former uranium mining site on the Navajo Nation that marked a high priority for assessment."

Oil and gas executives have long claimed that there is no case in which hydraulic fracturing has contaminated a drinking water aquifer. But such a case exists. And one of the biggest bars to enumerating suspected additional cases is the oil and gas industry's refusal to allow disclosure of them -- a condition of court settlements with landowners.

"Conservation groups working across the Gulf of Mexico are supporting a bipartisan bill in the Senate that would direct to five Gulf states the billions of dollars in fines that may be imposed on BP and other companies found responsible for the last year's oil spill."

"Japan will sack three top energy officials over their handling of the Fukushima atomic disaster and scandals that have fuelled public mistrust in the country's nuclear policy, the government said Thursday."