"Pacific Gas and Electric Co. could face a record fine for a deadly 2010 natural gas pipeline explosion in a San Francisco suburb. Officials hope it will help prevent future accidents while some warn that rising natural gas demand is outpacing investment in energy infrastructure."

"JPMorgan Chase developed schemes to sell electricity at falsely attractive prices in Michigan and California, according to The New York Times. The market manipulation could result in JPMorgan Chase receiving penalties from the Federal Energy Regulatory Commission."

"Tesla joins Nissan Leaf and Chevy Volt in the race for electric car sales. After a recording-breaking March for the Nissan Leaf, sales of electric cars dipped in April."

Pilots will soon launch an effort to fly a solar-powered airplane across the United States.

"An independent study co-published by the Faulkner County Citizens Advisory Group and Global Community Monitor reveals that, in the aftermath of ExxonMobil's Pegasus tar sands pipeline spill of over 500,000 gallons of diluted bitumen (dilbit) into Mayflower, AR, air quality in the area surrounding the spill has been affected by high levels of cancer-causing chemicals."

"Exxon Mobil Corp's near 70-year-old Pegasus oil pipeline leaked a small amount of crude into a residential yard in Ripley County, Missouri on Tuesday, a month after the same pipe spewed thousands of barrels of crude in Arkansas."

"More than 50,000 high-polluting diesel engines have been cleaned up or removed from U.S. roads in a federal program designed to reduce smog and greenhouse gases, according to a new Environmental Protection Agency report to Congress. While industry and environmental officials call the program a landmark success, it is now threatened with a 70 percent cut in funding under the Obama Administration’s new budget."

"BP made a record pre-tax profit in the first quarter of double its $9bn for the same period in 2012, the company announced on Tuesday, as a Norwegian regulator rebuked the company for a 2012 oil spill in the North Sea."

"Environmental groups on Monday announced a new ad campaign that highlights ExxonMobil's massive oil spill in Arkansas last month. The ads will be concentrated in the Washington, D.C., Metro's Foggy Bottom station, which is used by many State Department employees commuting to work, as the agency considers whether to approve the construction of the Keystone XL pipeline."

"CONWAY, SC -- Pollution from a pair of coal ash ponds at Santee Cooper’s retired Grainger electric generating plant here has sparked another lawsuit – this one filed by The Southern Environmental Law Center, which alleges the state-owned utility is violating the federal Clean Water Act."