here on sandra brown's farm in greene county, in the south-western corner of pennsylvania. brown says it's a great time to be selling organic beef. >> there's much more demand than i can supply. >> you might wonder why she's put her farm on the market. >> how much is it up for sale for? >> 449. that's a 3800 square foot house, b&b and 45 acres, a pond, a wood barn - i mean, so, it's a beautiful place. >> but brown is selling because she worries it won't stay a beautiful place. her farm is sandwiched between a proposed coal operation and natural gas drilling. greene county's lush hills can feel a wealth of energy-riches below, a confluence of appalachian coal and an enormous gas reserve called the marcellus shale. you are getting it from both sides. >> yes, the coal mining is going down there and the fracking is going on up there. >> down the road from brown's farm a community has disappeared - the village of holbrook. the homes brought by a coal company stand vacant to make way for a long-haul coal mine. it empanels a quarter mile wide and a mile long. half a mile away, tuc