"Negotiations between Enbridge Inc. and the U.S. Environmental Protection Agency have been extended again over a fine that could exceed $100 million for violations under the Clean Water Act in the pipeline operator’s 2010 Kalamazoo River disaster."

"Kansas’ abundant wind power was poised to help the Sunflower State and several surrounding neighbors comply with new federal requirements to reduce carbon dioxide emissions."

"Testing that found unhealthy air quality around three Luminant coal plants could speed up efforts to reduce pollution in North Texas."

"Volkswagen internal memos and emails suggest that company executives pursued a strategy of delay and obfuscation with United States regulators after being confronted in early 2014 with evidence that VW diesel vehicles were emitting far more pollutants than allowed."

"State officials formally declared the Aliso Canyon gas leak capped Thursday, but uncertainty remains about the future of the facility and the residents who live around it."

"Railroads that haul oil trains through Washington state will need to report whether they could afford around $700 million to pay for a derailment and spill, under a recently finalized state rule."

"There was a huge global spike in one of the most potent greenhouse gases driving climate change over the last decade, and the U.S. may be the biggest culprit, according a new Harvard University study."

"Federal regulators say corrosion on the outside of an oil pipeline was the cause of a major crude spill on the Santa Barbara coast last year."

"The Sooner State has switched strategies, limiting not just the depth, but amount of wastewater than oil and gas producers can pump back underground."