Around the world, governments are taking stock of oil submerged aboard long-sunk, deteriorating vessels.
An estimated 1,000 barrels or 42,000 gallons of crude oil has spread over nearly 100 miles along the flooded banks of the Yellowstone River in Montana.
The year-long process may provide an alternative bioremediation treatment for removing oil.
Overall, beaches in the Great Lakes region were the worst, while those in the Southeast and NY/NJ were the best.
A design for a New York City pool proposes that it float on the Hudson River and filter water through its sides.
Unpredictable ice and bad weather could make it nearly impossible to respond to a spill on the scale of what was seen in the Gulf a year ago.
Life around the Gulf for humans has largely returned to normal a year after the BP oil spill. For wildlife, however, it may be a different story.
More and more workers in the aftermath of the Deepwater Horizon oil catastrophe report chronic symptoms neither they nor their doctors can explain.
The death toll of animals from the BP oil spill in the Gulf of Mexico may be 50 times higher than originally reported.
An eco-friendly method could extract millions of barrels of oil and tar trapped in sand.