"The world's largest solar power plant cleared an important hurdle on Wednesday, laying the groundwork for a dramatic expansion in solar energy generation in the United States and around the world. The proposed $6 billion-plus Blythe, California plant, originally proposed by Chevron Corp. and Solar Millennium AG, won clearance to build from the California Energy Commission."

"The Interior Department said Wednesday that oil and gas companies operating in the Gulf of Mexico need to do more to permanently plug nearly 3,000 inactive wells and dismantle about 650 production platforms that are no longer in use."

Republicans and some coal-state Democrats have not given up on efforts to stop EPA from regulating greenhouse gases. But a divisive Senate vote is unlikely until after the November election, and any bill to block EPA couldn't be enacted in this Congress anyway, given House and White House opposition. The real question is what might happen next year.

"WILMINGTON, Del. -- Conservative Senate candidate Christine O'Donnell shocked the state by seizing a surprise primary victory over Republican Rep. Mike Castle, a longtime moderate lawmaker who suffered withering attacks for supporting cap and trade last year."

"A federal judge has ordered 99¢ Only Stores to pay $409,490 in penalties for the sale of illegal unregistered and misbranded pesticides contained in household products."

"Oliver Kuttner and his team of designers have seen the future of fuel-efficient cars topping the dreamed-of mark of 100 miles per gallon. This week, the Edison2 team is being rewarded for its vision with half of the $10 million X Prize."

"U.S. 9th Circuit panel says Southern California air quality board can't impose restrictions that could interfere with interstate commerce."

"According to recently leaked documents, the Pennsylvania Office of Homeland Security has been tracking anti-gas drilling groups and their meetings — including a public screening of the film 'Gasland,' a documentary about the environmental hazards of natural gas drilling."

"The Corn Refiners Association, which represents firms that make the syrup, has been trying to improve the image of the much maligned sweetener with ad campaigns promoting it as a natural ingredient made from corn. Now, the group has petitioned the United States Food and Drug Administration to start calling the ingredient 'corn sugar.'"