"The U.S. electric power grid is one of the biggest, most costly machines on Earth."

"The Texas Commission on Environmental Quality approved expanding a wastewater permit for a South Texas coal mine over vocal opposition from locals Wednesday."

"Bucking the trend of conserving cash at a time of low oil prices, the American oil giant Chevron said on Tuesday that it would go ahead with a $37 billion expansion of a gargantuan oil field on the Caspian Sea in Kazakhstan."

"The success of large-scale solar has raised questions about the wisdom of continuing incentives for rooftop installations, which remain far more expensive than most other forms of electricity."

"Arsenic. Lead. Mercury. Sulfuric Acid. At a closed Duke Energy power plant, at least 10 billion pounds of coal ash containing these toxins and more are sitting on the banks of the Ohio River – a source of drinking water for more than 5 million people."

"The number of earthquakes in Oklahoma has fallen 25% in 2016 compared with a year earlier, a decline attributed in part to actions by state regulators to police the oil and gas industry’s practice of pumping wastewater from its operations deep underground."

"A Mississippi project, a centerpiece of President Obama’s climate plan, has been plagued by problems that managers tried to conceal, and by cost overruns and questions of who will pay."

"Enbridge Inc. and its oil industry partners have seen their faint hope for the Northern Gateway pipeline project dealt a major blow Thursday as the Federal Court of Appeal quashed the permit issued by the federal cabinet two years ago."

"The Interior Department said Thursday it is changing the way it values coal mined from public lands in the West to make sure mining companies are not shortchanging taxpayers on sales to Asia and other markets."

"BOKOSHE, Oklahoma — Here in the land of wind-whipped, rolling plains, the gray dust, which sparkles in just the right light, seems inescapable. Residents of this town near the Arkansas line say they have spotted it on their grass, trees, ponds, barns, furniture and cars."