"Federal investigators are exploring whether BP PLC representatives lied to Congress about how much oil was leaking after the Deepwater Horizon accident two years ago, a development that could lead to additional criminal charges against current and former company employees."

"Florida's top state wetlands expert has been suspended after she refused to issue a permit on a controversial project -- one that she said her boss was willing to bend the rules to approve."

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"Job growth in the nation's coal fields has taken a hit amid tough market conditions for U.S. coal and competition from natural gas, according to a review of federal employment statistics."

"Canada is dismantling the nation's entire ocean contaminants program as part of massive layoffs at the Department of Fisheries and Oceans."

"BEIJING --  China’s Commerce Ministry accused the United States government on Thursday of violating free-trade rules through support for six renewable energy projects, but did not identify the projects or the trade rules that had allegedly been violated. It was the latest volley in a widening conflict between the two countries over clean power.

The United States and China, the world’s two biggest energy users, have pledged to work together to develop renewable sources. But they accuse each other of improperly subsidizing or protecting their manufacturers.

"The White House appears to be blocking Environmental Protection Agency efforts to tighten oversight of engineered nanoscale pesticides and other chemicals, according to environmental and safety advocates."

"Earlier this month, the State University of New York at Buffalo released a report concluding that fracking is getting safer, as both industry and regulators are doing a better job. The study got plenty of coverage--the Associated Press, Forbes, WGRZ, Buffalo News--but in the week since it was released, it's been attacked for a number of flaws."

"Moving quickly to stem a controversy, President Barack Obama on Thursday nominated an expert on nuclear waste to lead the federal agency that regulates the nation's nuclear power plants."

"HOUSTON -- As the Memorial Day weekend and the summer driving season approach, gasoline prices are easing. But most drivers will find prices only modestly lower than a year ago."

"The ultra-conservative Heartland Institute admitted it was in financial crisis on Wednesday, with the flight of corporate donors making it difficult to pay staff or cover the costs of its annual conference aimed at debunking climate science."