National (U.S.)

"It appeared from seemingly out of nowhere, a great arctic snowy owl on a bitter cold Wednesday in the middle of downtown Washington."

"Health care spending in the U.S. has surged more than eightfold since the 1960s. Skyrocketing in that same time: Rates of chronic disease, use of synthetic chemicals, and evidence that many of these widely used substances may be wreaking havoc on human health."

"The U.S. Forest Service considers allowing hydraulic fracturing for natural gas in George Washington National Forest in Virginia, stirring concern about risks to drinking water in the Washington, D.C., area."

"New urban waterways are making a come back. Cincinnati is following the lead of Seattle, Kalamazoo, Mich., and other cities by bringing back a buried stream that has been underground for a century. Uncovering these streams have environmental and economic benefits."

"The chemical compound that gives some sodas a caramel-brown color could be a carcinogen—and according to a new study by Consumer Reports, it's in many popular soft drinks at levels that exceed what many experts consider safe. Between April and December of 2013, researchers tested 110 bottles of various brands of soda for the 4-methylimidazole, or 4-MeI for short. They found the highest levels of the substance in Goya Malta, a malt-flavored soda popular in Latin American communities, and in various Pepsi products."

"MIDDLEBOROUGH, Mass. — Carl Horstmann strode around the floor of his factory here, passing welders honing head-high metal tubes as sparks flew. He is one of a dying breed: the owner of Mass Tank, a steel tank manufacturer in a down-at-the-heels region that was once a hub of the craft."

"A large section of the controversial Keystone XL pipeline went into official operation Wednesday, in a move that supporters say will help ease the flow of oil to refineries in the Gulf Coast region. The Obama administration has yet to rule on the project's northern portion."

"CHARLESTON, W.Va. -- West Virginians should have been given clearer information that the 1-part-per-million screening level for the toxic chemical "Crude MCHM" was not a "bright line" between what exposures are safe and unsafe, a top U.S. Centers for Disease Control scientist said Wednesday."