"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.

"Oil fell to a seven-month low below $91 a barrel Wednesday after Iran agreed to allow the U.N. nuclear agency to restart an investigation into the country's nuclear program."

"Chicago commuters have all the fun. Two weeks ago, there was the Heartland Institute’s Unabomber billboard likening a belief in climate change to psychopathy. This week, those stuck in traffic missed out on one larger-than-life retort to the Heartland campaign but will get to view another."

"The United States on Thursday announced the imposition of antidumping tariffs of more than 31 percent on solar panels from China. The move by the Commerce Department is certain to infuriate Chinese officials already upset after recent bilateral frictions over China’s human rights policies and its increasingly confrontational approach toward American allies like the Philippines and Japan."

"WASHINGTON -- Progressive lawmakers Sen. Bernie Sanders (I-Vt.) and Rep. Keith Ellison (D-Minn.) teamed up on Thursday to introduce legislation designed to stop subsidies to the oil, coal and natural gas industries, preserving an estimated $110 billion over the next ten years."

"With a simple statement on Tuesday, State Farm Insurance became the latest company to withdraw its support from the Heartland Institute, a Chicago-based think-tank which claims a 'realist' position questioning that humans are responsible for climate change."

"HOUSTON -- Aubrey K. McClendon built Chesapeake Energy into the nation’s second-largest producer of natural gas through a combination of debt, foresight, luck and sheer bravado. Now both he and the company have been forced to add humility to the mix."