In Pennsylvania, there's an industrial revolution going on. Battalions of drilling rigs are boring into the earth to extract natural gas from an underground layer of shale called the Marcellus formation.
The first one came from coal mining. All over the state, you can see bright orange rivers and streams. The aquatic life was killed by acidic runoff from abandoned mines.
"Are we really going to let this happen to Pennsylvania again?" asks David Yoxtheimer, a hydrologist at Penn State who grew up here. "Are we going to make sure that we have enough money and that these companies' feet are held to the fire to make sure that once their operations are done, they put everything back together, tidy it up, and make it look like nothing happened there in the first place?"
Progress isn't always pretty. In the natural gas boom, a lot of the ugliness has to do with water.
Much of the US faced another round of biting winter weather on Sunday, with torrential rains...
