"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."

"Federal regulators said on Tuesday that they had fined three companies for mislabeling the type of crude oil they were transporting. The penalties — a total of $93,000 — were the first from surprise inspections begun after since a series of accidents in the last year underscored the hazard of transporting highly flammable oil by rail."

"WASHINGTON — Members of Congress and West Virginia officials say patchwork federal regulations are inadequate to protect the public from spills such as the one last month that contaminated drinking water for 300,000 people in the Charleston area."