Around the world, governments are taking stock of oil submerged aboard long-sunk, deteriorating vessels.
Turning seaweed into a fuel source could help ease competition on land for growing crops.
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.
Billions of tons of "end-of-life" plastics could be diverted from landfills and turned into gas for vehicles.
BMW, Ford and Chevrolet are testing a method to capture waste heat from car engines to improve gas mileage.
For the first time, scientists have shown that exposure to a compound in crude oil is associated with congenital heart disease.
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.
A new technique uses microwaves to cheaply convert used motor oil into fuel.
Plant-based plastics may seem like a good option, but making them is not such an environmentally-friendly process.
The vacuum cleaner spits out bark or another material to absorb oil, and then sucks the oil-laden material up.