National (U.S.)

"A rare, frank conversation with the former vice president and climate-change activist."

"Prominent Republicans and conservative news media outlets rallied in recent weeks around the cause of Nevada rancher Cliven Bundy, whose armed standoff with authorities over grazing rights on federal land had made him an instant folk hero on the right. But Bundy’s GOP defenders, including Sens. Dean Heller (Nev.) and Rand Paul (Ky.), rapidly abandoned him on Thursday following reports of incendiary remarks that the white rancher made about minorities. Bundy wondered aloud whether blacks would be better off as slaves picking cotton, and alleged that people of color are 'against us.'"

"A February accident at a nuclear waste dump that resulted in the contamination of 21 workers resulted in part from "poor management, ineffective maintenance and a lack of proper training and oversight," a Department of Energy report concludes."

"Wyoming explosion: The town of Opal, Wyoming was evacuated, but no injuries were reported in an explosion at a facility that removes impurities from natural gas and serves large numbers of customers in the West."

"A new study is asserting a link between climate change and both the intensifying California drought and the polar vortex blamed for the recent harsh winter."

A major supplier to the oil and gas industry says it will begin disclosing 100 percent of the chemicals used in hydraulic fracturing fluid, with no exemptions for trade secrets. The move by Baker Hughes of Houston is a shift for a major firm; it's unclear if others will follow suit."

"A day after Canada issued stringent new rules for the transportation of oil by rail, federal regulators in the United States said on Thursday that they would push forward their own tank standards next week, potentially resolving a critical safety issue that has been mired in regulatory limbo for years."

"In the ongoing battle over offshore drilling, a federal judge in Alaska told regulators Thursday to redo an environmental impact study that underestimated the amount of recoverable oil and, potentially, the risks to delicate Arctic habitat."

"The Food and Drug Administration will for the first time regulate the booming market of electronic cigarettes, as well as cigars, pipe tobacco and hookahs, under a proposal to be released Thursday."

"After almost two decades of reports, hearings, failed proposals and political wrangling, federal regulators on Wednesday announced sweeping changes to protect coal miners from black lung disease."