"Arch Coal, the second-largest U.S. coal miner, filed for Chapter 11 bankruptcy protection on Monday with a plan to cut $4.5 billion in debt from its balance sheet in the midst of a prolonged downturn in the coal industry."

"The continuing collapse in commodity prices pushed oil futures still lower Monday, and analysts predicted that the slide was far from over."

"Kentucky may be the nation’s third-leading coal producer, but over the years it has increasingly turned to other states to supply coal for its power plants."

"As the price of oil plunges to its lowest point in 12 years — and threatens to drag the broader U.S. economy down with it — lawmakers say Congress should consider helping teetering energy companies with policy fixes beyond the decision to lift the oil-export ban."

"California governor’s state-of-emergency declaration includes requirement that gas utility pay to fully mitigate the leak's emissions of methane."

"Coal production in the U.S. has dropped to its lowest level in 30 years thanks in part to low natural gas prices and climate policies encouraging utilities to switch to natural gas to generate electricity."

"TransCanada said on Wednesday that it would seek $15 billion in damages over the Obama administration’s decision to cancel the company’s Keystone XL pipeline project."

"Oil prices plunged again on Wednesday by more than 5 percent as investors paid more attention to signs that global stockpiles are growing than to increasing instability in the Middle East and North Africa."