A well-working market that prices conservation as a source of electrical energy faces serious legal challenges from power producers.

"VIENNA — The oil cartel OPEC decided on Thursday not to cut petroleum production, despite the plunge in prices in recent months that has indicated the diminishing clout of the organization."

You are not paranoid, environmentalists learn from a leaked Powerpoint deck. The oil industry really is out to kill efforts to counter climate change.

"A ProPublica analysis of federal government data adds new details to what’s known about the routes taken by trains carrying crude oil. Local governments are often unaware of the potential dangers they face."

"As oil prices continue to plummet, the once-dominant international cartel of producers is losing its sway over the global energy markets."

"Capping more than three years of study, the O'Malley administration declared Tuesday that hydraulic fracturing for natural gas can be done safely in Western Maryland, but only after regulations are tightened to reduce air and water pollution and protect residents from well contamination, noise and other disruptions associated with an anticipated drilling boom."

"As biotech masterminds and venture capitalists scramble to hatch a new generation of environmentally friendly fuels that can help power the average gasoline-burning car, they are confronting an unexpected obstacle: the White House."

"Federal officials will hold an auction in January for the rights to build wind turbines off Massachusetts’s shore, the largest sale of its kind."

"Global investment in tackling climate change fell for a second year in 2013 to $331 billion, largely due to a drop in the cost of solar power technology, according to an annual report on climate finance."

"For the solar and wind industries in the United States, it has been a long-held dream: to produce energy at a cost equal to conventional sources like coal and natural gas. That day appears to be dawning."