"Energy Secretary Ernest Moniz traveled to Waynesboro, Ga., Thursday to announce the finalization of a $6.5 billion loan guarantee for the Vogtle Electric Generating Plant -- the first nuclear loan guarantee that the Obama administration has completed."

"WASHINGTON — President Obama in recent days has been announcing muscular executive actions to address climate change, making good on his promise to act on pressing problems “with or without Congress.” On Monday, the Supreme Court will consider the limits of that approach, in a case on greenhouse gas emissions."

"Farm workers, children and other people working or living near farm fields would have more protection from hazardous pesticides under changes proposed on Thursday by the U.S. Environmental Protection Agency."

"If an oil train explosion on the scale of last year's deadly crash in Quebec roiled a U.S. town, would railroads have enough emergency personnel and equipment ready to respond? In most cases, transportation regulators don't know."

"Tesla Motors Inc., posting fourth-quarter results that beat analyst estimates, is gearing up for further growth with plans to raise Model S sedan production 56 percent this year and to build a massive battery plant."

"Federal prosecutors widened their investigation triggered by a massive coal ash spill in North Carolina, demanding reams of documents and ordering nearly 20 state environmental agency employees to testify before a grand jury."

"CHURCH ROCK, N.M. — In this dusty corner of the Navajo reservation, where seven generations of families have been raised among the arroyos and mesas, Bertha Nez is facing the prospect of having to leave her land forever."

"Prime Minister Stephen Harper was again rebuffed in his bid to press U.S. President Barack Obama to approve the controversial Keystone XL pipeline when he raised the issue during a North American leaders’ summit in Toluca, Mexico."

"A Nebraska court on Wednesday invalidated the governor's decision to allow the Keystone XL pipeline to pass through the Midwestern state, casting new uncertainty over the controversial project to link Alberta's oil sands with refineries in Texas."

"Canadian Prime Minister Stephen Harper’s frustration with U.S. President Barack Obama’s failure to approve the Keystone XL pipeline may make this installment of the North America summit, known as the “Three Amigos,” the frostiest since the annual meetings began almost a decade ago."