Related by context. Frequent words. (Click for all words.) 66 carbon sequestration 58 sequestration 56 coal gasification 55 carbon capture 50 biochar 49 gasification 48 Carbon Capture 48 coalbed methane 48 coal 48 shale 48 EOR 48 EPRI 47 geochemist 47 tar sands 47 biomass 47 geological formations 47 coal gasification plant 47 shale gas 47 IGCC 47 bioenergy 46 methane 46 Gasification 46 CO2 46 geothermal 46 gas hydrates 45 Fischer Tropsch 45 hydraulic fracturing 45 shale deposits 45 natural gas 45 carbon dioxide 45 switchgrass 45 fracking 44 woody biomass 44 hydrometallurgical 44 greenhouse gas 44 coal fired 44 contaminated groundwater 44 geoscientist 44 catalysis 44 integrated gasification 44 FutureGen 44 pyrolysis 44 sequester carbon 43 greenhouse gas emission 43 Oil Shale 43 shales 43 Geothermal 43 groundwater 43 renewable energy 43 geologic 43 oil sands 43 geosciences 43 greenhouse gas GHG 43 biofuel 43 fossil fuel 43 Biomass 43 coal slurry 43 GHG 42 FutureGen Alliance 42 heap leaching 42 reclamation 42 tailings 42 exploratory drilling 42 lignite 42 geology 42 biosolids 42 Surat Basin 42 coal seam gas 42 nitrous oxide emissions 42 Tar Sands 42 bed methane 42 biofuels 42 economically viable 42 geological 42 radioactive wastes 42 Marcellus Shale 42 Powder River Basin 42 tailings ponds 42 environmental 42 greenhouse gases 42 Marcellus Shale formation 42 EERC 41 fossil fuels 41 Alberta tar sands 41 carbon 41 emission 41 fly ash 41 cellulosic ethanol 41 Shale Gas 41 emission reductions 41 bioremediation 41 Uinta Basin 41 Carbon Dioxide 41 subsurface 41 Clean Coal 41 reducing CO2 emissions 41 heap leach 41 biodiesel 41 desalination 41 hydrocarbons 41 corn ethanol