"An official with the Army Corps of Engineers told a Congressional committee Tuesday it doesn't plan a broad environmental study on exporting coal from the western United States."

"TransCanada Corp., which says Keystone XL will be the safest pipeline ever built, isn’t planning to use infrared sensors or fiber-optic cables to detect spills along the system’s 2,000-mile (3,200-kilometer) path to Texas refineries from fields in Alberta."

"The latest domestic energy boom is sweeping through some of the nation's driest pockets, drawing millions of gallons of water to unlock oil and gas reserves from beneath the Earth's surface."

"Illinois Gov. Pat Quinn on Monday signed into law the nation's strictest regulations for high-volume oil and gas drilling."

"None of the companies operating in Canada's tar sands have met a commitment to clean up the vast and expanding sprawl of toxic waste ponds, an official report has found."

"A solar-powered plane nearing the close of a cross-continental journey landed at Dulles International Airport outside the nation’s capital early Sunday, only one short leg to New York remaining on a voyage that opened in May."

"CROW AGENCY, Mont. — Every few hours trains packed with coal pass through the sagebrush-covered landscape here in southern Montana, some on their way north to Canadian ports for shipment to Japan and South Korea. If the mining company Cloud Peak Energy has its way, many more trains will cross the prairie to far larger proposed export terminals in Washington State."

"When does a nuclear plant become too old? The nuclear industry is wrestling with that question as it tries to determine whether problems at reactors, all designed in the 1960s and 1970s, are middle-aged aches and pains or end-of-life crises."

"The U.S. Justice Department filed a joint lawsuit with Arkansas on Thursday against oil producer Exxon Mobil Corp over the pipeline spill in March of thousands of barrels of heavy Canadian crude oil in a suburban neighborhood."