Related by context. Frequent words. (Click for all words.) 42 coal seams 41 shale 40 shale formations 37 coal seam 36 drillers 36 Marcellus Shale formation 36 fracking 35 shale deposits 35 bed methane 35 hydraulic fracturing 34 Fracking 33 horizontal drilling 33 Marcellus shale 33 Cabot Oil 33 tar sands 33 blasting 33 subsurface 32 horizontal wells 32 Shale 32 shales 32 Methane 32 wellbore 32 Appalachian Basin 31 Range Resources 31 hydrofracking 31 methane 31 drilling 31 coalbed methane 31 Roan Plateau 31 Marcellus Shale 30 screamer 30 toxic pollutants 30 mountaintop mining 30 brine 30 drilling fluids 30 rasping 29 Gas Drilling 29 EOG Resources Inc. 29 directional drilling 29 methane gas 29 Barnett Shale 29 oil sands 29 thunderous 29 shale gas 28 Encana 28 coal seam gas 28 Blasting 28 DeGette 28 ERCB 28 EnCana 28 underground aquifers 28 W.Va. mine 28 Oilsands 28 Gasland 28 oilsands 28 BOEMRE 27 frac 27 Chesapeake Energy 27 Fayetteville Shale 27 hydrocarbons 27 Haynesville Shale 27 tailings ponds 27 blasters 27 BP Macondo 27 mountaintop removal mining 27 aquifers 27 mountaintop removal coal 26 mountaintop removal 26 Environmental Conservation 26 Athabasca River 26 natural gas 26 Sludge 26 extraction 26 Deepwater Horizon 26 Piceance Basin 26 Surface Mining 26 EOG Resources 26 ANWR 26 exploratory drilling 26 Tittel 26 mining 25 Alberta oilsands 25 toxic chemicals 25 carcinogens 25 Powder River Basin 25 TCEQ 25 Marcellus 25 wells 25 pollutant 25 extractive 25 fizzing 25 outer continental shelf 25 Keystone XL pipeline 25 DEP 25 carbon sequestration 25 hydrogen sulfide 25 hydrogen sulphide 24 screech 24 sludge 24 compressor stations 24 leachate