"TRAVERSE CITY, Mich. -- Three U.S. senators asked a federal agency Wednesday for evidence that a pipeline crossing a section of the Great Lakes is safe, following a roughly 10 percent increase in its capacity to carry oil."

"Commentaries by two of China's most influential news outlets suggesting that the country's air pollution crisis was not without a silver lining drew a withering reaction on Tuesday from internet users and other media."

EPA announced on December 11, 2013, that it was adding nine new contaminated sites to the National Priorities List (NPL) for the Superfund hazardous waste cleanup program. Another eight sites are also being proposed for addition to the NPL.

"DETROIT -- Torrents of water spew from broken pipes in Detroit's Crosman School, cascading down stairs before pooling on the warped tile of what was once a basketball court."

"A New York environmental group says the use of fracking waste on some of the state’s roads is occurring more than initially thought. The state agency that regulates the use of fracking brine says it ensures the waste does not have high concentrations of pollutants."

"The U.S. environmental regulator argued in court on Tuesday that its rule limiting mercury and hazardous air pollutants is 'appropriate and necessary,' not an improper interpretation of the federal Clean Air Act as industry groups and some states contend."

"WASHINGTON -- U.S. Supreme Court justices offered President Barack Obama's administration some encouragement on Tuesday as they weighed the lawfulness of a federal regulation limiting air pollution that crosses state lines, mostly emissions from coal-fired power plants."

"WASHINGTON — In a battle that pits the East Coast against the Midwest over the winds that carry dirty air from coal plants, the governors of eight Northeastern states plan to petition the Environmental Protection Agency on Monday to force tighter air pollution regulations on nine Rust Belt and Appalachian states."

"The United States will help China implement stricter emission standards for vehicles in a bid to help the world's biggest carbon emitter tackle rampant air pollution, the White House announced on Thursday."

"Environmental and industry advocates say a proposed air emissions reporting permit issued last week for BHP Billiton Ltd.'s San Juan Coal Mine in northwestern New Mexico is the first -- or among the first -- ever proposed for a coal mine."