"North Carolina's top environmental official says he briefed Gov. Pat McCrory about a negotiated settlement with Duke Energy that would have fined the $50 billion corporation $99,000 to resolve violations for groundwater contamination leaching from two huge coal ash dumps."

"RALEIGH — The U.S. Justice Department has opened a criminal investigation into the state environmental agency tasked with regulating Duke Energy after a coal ash spill left the Dan River so polluted that people were advised to avoid contact with the water."

"The White House announced a new ban on sales of elephant ivory within the United States on Tuesday, part of a plan aimed at cracking down on trafficking of wildlife that is threatening some species, including the African elephant, with extinction."

"WASHINGTON — The Obama administration on Tuesday moved to exert more control over the injection of diesel fuel deep underground to extract oil and natural gas, its first foray into addressing the potential contamination of water from the controversial technique."

"Just weeks after a TransCanada natural gas pipeline exploded and left thousands of residents without gas in sub-zero temperatures, a CBC News investigation uncovered a 2011 report, buried by federal regulators, that criticized the company “for ‘inadequate’ field inspections and ‘ineffective’ management.”"

"CORPUS CHRISTI, Texas -- A South Texas judge has fined Citgo Petroleum more than $2 million after finding it guilty of felony violations of the U.S. Clean Air Act by its Corpus Christi refinery."

"Keystone XL pipeline records are being sought by the Sierra Club in a lawsuit claiming the U.S. Army Corps of Engineers has to make public documents related to its review of TransCanada Corp.’s project."