Elizabeth Shogren

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Methane is a potent greenhouse gas from oil and gas production. The rules require companies to find and repair equipment leaks. The rules also will reduce air pollution that contributes to smog.

The fact that a second contaminant in West Virginia's drinking water eluded detection for nearly two weeks — despite intense testing of the water — reveals an important truth about how companies test drinking water: In most cases, they only find the contaminants they're looking for.

In desperation to save the rare northern spotted owl, biologists are doing something that goes against their core — shooting another owl that's rapidly taking over spotted owl territory across the northwest.

"If we don't do it, what we're essentially doing, in my view, is dooming the spotted owl to extinction," says Lowell Diller, senior biologist for Green Diamond, a timber company.

The chemical that was found last week to be contaminating the drinking water of hundreds of thousands of West Virginians is used to clean coal. But very little is known about how toxic it is to people or to the environment when it spills.

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