Environment

The Kulluk, the Shell oil-drilling rig that washed aground last weekend, is afloat and being towed to shelter on Kodiak Island in the Gulf of Alaska. The craft began its 30-mile trip late Sunday night. Examinations of the vessel have not found any signs of a leak.

Jobs may be scarce around the United States, but not in western North Dakota. A massive oil boom in Williston and the surrounding area is transforming the landscape and culture of this once-tranquil region.

Producer Todd Melby, who has been covering the boom for public media, composed an interactive documentary with radio stories and videos called "Rough Ride: The Oil Patch Tour." This guided tour through the oil patches illustrates the growth of oil fields over time.

An earthquake with a magnitude of 7.5 hit off the coast of southeastern Alaska just before midnight local time Friday, according to the U.S. Geological Survey. The USGS initially reported the event as a magnitude 7.7 quake.

The National Oceanic and Atmospheric Administration says sea level readings indicate the quake caused a tsunami. "It may have been destructive along coasts near the earthquake epicenter," a NOAA report said.

Whether you're a homeowner who bought an energy-saving refrigerator last year or a company hoping to build a wind farm, the tax package Congress just approved may give you a reason to cheer.

"It's got something in there, a Christmas gift if you will, for almost everyone — American homeowners, workers who commute via transit, and manufacturers of efficient equipment like clothes washers, dryers, refrigerators," says Kateri Callahan, president of the Alliance to Save Energy.

Transocean, the owner of the Deepwater Horizon rig where 11 men died in April 2010, has agreed to pay $1.4 billion in criminal and civil penalties to resolve Justice Department allegations over its role in the Gulf of Mexico oil spill.