natural gas trapped inside the marcellus shale. hundreds of trillions of cubic feet worth. enough to supply the northeast for decades to come. greg and julie say they, too, are being fracked. >> i'm going to play a litvitle devil's advocate with you.at that's a little why they say i they're doing this. because this is clean fuel? >> it's not clean. it's a fossil fuel. any fossil fuel, coal, oil, gas, is -- they don't see the dirty side. this is the dirty side of natural gas. it's clean to burn but it's not clean to get. >> reporter: like bill, this well is poison. pennsylvania's department of environmental protection confirmed it and is now forcing the gas exploration company, cabot oil and gas, to truck in clean drinking water. though cabot denies its process of fracturing is contaminating anything. citing a 2004 epa study which