Related by context. Frequent words. (Click for all words.) 50 methane 49 contaminate drinking 49 flammable gases 49 isomerization unit 47 methane gas 47 contaminate groundwater 46 Jeff Gillenwater 46 Kleen Energy plant 45 naturally occurring methane 45 coal seam 45 Lapindo 44 MSHA 44 methane hydrates 44 BP Macondo 44 COGCC 44 compressor stations 44 Deepwater Horizon blowout 44 incomplete combustion 44 gases 44 Kleen Energy Systems 43 pollute groundwater 43 polluted groundwater 43 vents methane 43 categorical exclusions 43 properly ventilated 43 ash ponds 43 coal slurry 43 deepwater wells 42 Darby Mine 42 toxic vapors 42 highly flammable liquid 42 combustible dust 42 Sulfur dioxide 42 Yuzhkuzbassugol 42 valley fills 42 smokestack emissions 42 pipeline rupture 42 Marcellus Shale formation 42 gasoline vapors 42 MOEX Offshore 41 noxious gases 41 Kleen Energy 41 depressurized 41 Deepwater Horizon 41 coal seams 41 Horizon exploded 41 Deepwater Horizon explosion 41 allowing combustible dust 41 natural gas 41 fracking 41 hydrogen sulfide 40 drilling rig exploded 40 hydrates 40 Hydraulic fracturing 40 Marcellus Shale Coalition 40 Neslin 40 hydraulic fracturing 40 dissolved solids 40 gas 40 faulty electrical wiring 40 Macondo 40 fires prompts evacuations 40 Sago Mine 40 blowout preventer 40 Raspadskaya mine 40 seepage 40 Steve Rinehart 40 damaged riser 40 propane leak 40 chemical vapors 40 gas hydrates 39 wellheads 39 wastewater discharges 39 ventilation 39 toxic pollutants 39 odorless colorless gas 39 Sago mine 39 Deepwater Horizon rig 39 toxic gases 39 Montcoal W.Va. 39 combustion 39 offshore drilling 39 Marcellus shale 39 Horizon rig 39 cement plugs 39 injection wells 39 soot particles 39 blowout preventers 39 BOEMRE 39 bed methane 39 mine subsidence 38 coalbed methane 38 Fracking 38 colorless odorless gas 38 standpipe 38 Bartlit 38 drill exploratory wells 38 particulate matter emissions 38 fracing 38 Slaiby 38 wells