"Emission controls required on out-of-state power plants have yielded big reductions in mercury pollution in Western Maryland's air, a study has found. So far, however, the state's fish remain as contaminated with the toxic chemical as ever, researchers say."

"The Barnett Shale's emissions have been vastly underestimated, sweeping Environmental Defense Fund-backed study finds."

"MUSTAFABAD, India — Khushboo Kushwaha has a few years before she will have to squat in front of a filthy, smoking open stove three times a day to cook meals for her family, as her older sister and cousins do now.

Khushboo is 11, and the girls in her home usually take up cooking duties as teenagers. But the smoke that billows from the wood and dried dung they burn, stinging the older girls’ eyes and throats, already affects her.

"U.S. gasoline pump prices are poised to drop below $2 a gallon for the first time in more than six years, which is sure to bring comfort and joy to drivers."

"The party is in talks with Republicans to lift a longtime ban on U.S. exports in exchange for clean-energy and other tax breaks."

"Imagine an oil slick quickly growing through the Straits of Mackinac from a rupture of the 62-year-old, twin pipelines known as Line 5 traversing the bottom of where Lakes Michigan and Huron connect."

"A fire on an oil platform in the Caspian Sea burned on Monday for a fourth day, and the Azerbaijani company that operates the site warned that the fire could spread to the oil wells that feed the platform, heightening the risk of a spill."

New York Attorney General Eric Schneiderman has petitioned the federal agency that regulates hazardous materials transport to set limits on the volatility of oil shipped by rail -- a major factor in explosions.

"As representatives of nearly 200 countries gathered in Paris to discuss ways of reducing emissions from fossil fuels, many pointed to what they consider a simple and obvious way to change behavior: Stop widespread subsidies that encourage the use of fossil fuels."

"OPEC has abandoned all pretense of acting as a cartel. It’s now every member for itself. At a chaotic meeting Friday in Vienna that was expected to last four hours but extended to nearly seven, the Organization of Petroleum Exporting Countries tossed aside the idea of limiting production to control prices."