Not dead yet! That's the news from the New Madrid fault line in the Midwest. For years geologists thought it was winding down seismic activity, but a new study says it's not. Melissa Block talks with seismologist Susan Hough of the U.S. Geological Survey, who co-authored the study.
Nearly two weeks after a chemical spill contaminated drinking water in West Virginia, the company involved revealed that it had spilled a second chemical too. Fortunately, officials don't think there was any added risk to the public. The fact that a second contaminant eluded detection reveals an important truth about drinking water supplies and how they're tested for contaminants.
Oil is now running through the southern part of the keystone XL pipeline. Supporters and opponents will be watching carefully to see what that could mean for the northern section of the project, that still awaits approval from the Obama administration.
A large section of the controversial Keystone XL pipeline was officially put to work Wednesday, in a move that supporters say will help ease the flow of oil to refineries. The Obama administration has yet to rule on the project's northern portion.
"People know about the global trade in shark fins, but few know that some of the most valuable fins ... used in shark fin soup come from the sharklike rays — species like sawfishes and wedgefishes and guitarfishes," says Sonja Fordham, who contributed to a new analysis of the fisheries.
Whole Foods recently decided it would not buy produce from farmers who used treated sewage sludge, also known as biosolids, on their fields. But scientists say this is a mistake — the material is safe and benefits the environment in lots of different ways.
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