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(Click for frequent words.) 70 fossil fuels 67 fossil fuel 62 finite fossil fuels 58 nonpolluting 58 dirtiest fossil 55 liquefied coal 55 Fossil fuels 55 weans itself 55 cleaner fuels 54 carbon emitting 54 alternative fuels 53 biofuels 53 fission reactors 53 nonrenewable fossil fuels 53 Propane autogas 53 nuclear fission reactors 53 nonfossil 52 fuels 52 bio fuels 52 bio diesels 52 gasifying coal 52 noncarbon 51 alternative energies 51 nonrenewable resources 51 nonfossil fuel 51 renewable energy 51 liquid fuels 51 biomass fuels 51 nonrenewable fuels 51 nonpolluting renewable 50 biodiesels 50 biofuel 50 polluting 50 greenhouse gas emitting 50 enery 50 biodiesel fuels 50 environmentally destructive 50 Sugarcane ethanol 50 agro fuels 50 Haugwitz 50 energy 50 hydrocarbon fuels 50 fossile fuels 49 renewable fuels 49 propane autogas 49 hydrofluorocarbons HFCs 49 gas swilling Hummers 49 environmentally damaging 49 cleaner burning 49 thermochemical processing 49 ethanol 49 Coal gasification 49 liquefying coal 49 sulfur fuels 49 dirtier fuels 49 renewable 49 Cellulosic ethanol 48 coal 48 depleting fossil 48 coal liquefaction 48 fuel 48 gas guzzling vehicles 48 renewably 48 decarbonizing 48 Solartopia 48 Solartopian 48 forest thinnings 48 cellulosic fuels 48 guzzling appliances 48 pollutive 48 environmentally benign 48 global warming gasses 48 pyrolysis oils 47 carbondioxide emissions 47 inefficient incandescent bulbs 47 agrofuels 47 hydrofluorocarbons 47 renewable energies 47 gasohol 47 gasified coal 47 conventional internal combustion 47 gas guzzling cars 47 diesel 47 Tailpipe emissions 47 baseload electricity 47 wind turbines solar panels 47 cookstoves 47 emitting greenhouse gases 47 incandescent lightbulbs 47 hydrogen 47 baseload renewable 47 internal combustion engines 47 Yang Ailun climate 47 exhaustible 47 nonpetroleum 47 CO2 emitting 47 corn ethanol 47 cleanest fossil 47 octane enhancer 47 House Gases GHGs 46 cleanest burning 46 Internal combustion engines 46 CO -2 emissions 46 internal combustion engine 46 decarbonised 46 cellulosic sugars 46 nonrenewable sources 46 nonrenewable 46 safest cleanest 46 emit carbon dioxide 46 polluting industries 46 emitting CO2 46 decarbonize 46 sugarcane ethanol 46 Renewable fuels 46 burning fossil fuels 46 HFC refrigerants 46 renewables 46 HFC# 46 greenhouse gasses 46 carbon dioxides 46 breeder reactors 46 decarbonise 46 Coleson Cove 46 environmentally unfriendly 45 carbon 45 filament bulbs 45 EROEI 45 unrenewable 45 biomass 45 biofuel feedstocks 45 petrodiesel 45 Renewable energies 45 renewably generated 45 gas guzzling automobiles 45 rapidly industrializing 45 biomass pellets 45 cellulostic 45 cellulostic ethanol 45 biodegradable nontoxic 45 biogases 45 carbon belching 45 GHG abatement 45 propane AutoGas 45 combustion engines 45 bio diesel fuels 45 Agrofuels 45 decarbonising 45 dimethyl ether DME 45 carbon emmissions 45 elemen 45 Fluorescent bulbs 45 decarbonization 45 Greenhouse gasses 45 decarbonized 45 nonfood crops 45 enegy 45 environmentaly friendly 45 internal combustion 45 ZENNergy technologies 45 hybrid powertrains 45 narcissism Twenge 45 gasify coal 44 depletable resources 44 negawatts 44 potent greenhouse gas 44 Cellulosic biofuels 44 sugar cane bagasse 44 Traditional incandescent bulbs 44 synthetic nitrogen fertilizers 44 methyl halides 44 gas guzzlers 44 ethanol butanol 44 emit greenhouse gases 44 Fischer Tropsch process 44 environmentally harmful 44 cellulose ethanol 44 calorically dense foods 44 biodiesel 44 gas guzzling 44 greenhouse gas HFC 44 Bio fuels 44 analyst Jens Riese 44 Stephan Singer 44 artificial photosynthesis 44 heat trapping pollutants 44 Renewable energy 44 IGCC plants 44 agriculturally derived 44 peaker plants 44 Kyoto Protocal 44 sugar cane ethanol 44 leaded petrol 44 ethanol bio diesel 43 de carbonise 43 Rooftop solar panels 43 nonfossil fuels 43 heat trapping carbon emissions 43 windmills solar panels 43 Butanol 43 ozone depleting compounds 43 Hydrogen Economy 43 CFBs 43 renewable feedstocks 43 bio diesel 43 gas guzzling SUVs 43 smokestacks tailpipes 43 rice husks 43 ketone bodies 43 Sven Teske Greenpeace 43 Haber Bosch process 43 harmful gasses 43 synfuels 43 de carbonizing 43 Vegan diets 43 structural readjustment 43 economically unsound 43 oxidised burned 43 compact fluorescents 43 King CONG 43 greenhouse gases 43 widespread diarrheal disease 43 emissons 43 Christopher Flavin 43 Nuclear fission 43 conventional combustion engines 43 biosequestration 43 convert cellulosic biomass 43 coal briquettes 43 cellulosic feedstock 43 emit CO2 43 incandescent bulbs 43 Incandescent bulbs 43 Compact fluorescents 43 commercialize cellulosic ethanol 43 technologically advanced flywheel 43 better conservers 43 emitting carbon dioxide 43 decarbonisation 43 hydroelectricity 43 de carbonize 43 photosynthetic microorganisms 43 chemical pulping process 43 cow farts 43 environmentally unsound 43 biomass combustion 43 gasoline 43 photovoltaics PVs 43 nitrogen oxide burners 43 combustion engine 42 Biofuel 42 cellulosic feedstocks 42 cellulosic materials 42 Compressed natural 42 synthetic fuels 42 geo sequestration 42 cheapest cleanest 42 hydroelectric thermoelectric 42 eco unfriendly 42 powerful TruePower Quattro 42 mimics photosynthesis 42 environmentally friendly 42 Ozone disinfection produces 42 cellulosic ethanol 42 geothermal hydro 42 chlorofluorocarbons CFC 42 Jim Crouse Capstone 42 gas guzzling behemoths 42 feedstock 42 bovine flatulence 42 Pellet stoves 42 photocatalysis 42 Fossil Fuel 42 cofiring 42 edible vegetable oils 42 Nickel Cadmium 42 ethanols 42 woody biomass 42 synthetic liquid hydrocarbons 42 biofuel crops 42 consumptive lifestyles 42 cleaner greener 42 nitrogen oxides NOx emissions 42 GHG emitting 42 gassification 42 natural gas 42 lamps CFLs 42 overuses antibiotics 42 environmentally friendlier 42 chlorofluorocarbon CFC 42 curbing greenhouse gases 42 harmful tailpipe emissions 42 replenishable 42 cane bagasse 42 coal fired 42 crop residues 42 wood pellet stoves 42 bioheat 42 petro diesel 42 converting cellulosic biomass 42 hybrids plug ins 42 carbon emissions 42 WSJ sub reqd 42 artificial fertilizers 42 smallholder agriculture 42 biofuel blends 42 carbon emitters 42 Burrard Thermal 42 Tar sands 42 mini hydros 42 Fischer Tropsch FT 42 Dialog Semiconductor creates 42 shale tar sands 42 APG dual 42 ozone depleting chemicals 42 synthetic fertilizers 42 Zhou Dadi 42 CO2 sequestration 42 TSX WPT 42 bio ethanol 42 geothermal tidal 42 diesel fuel 42 Lithium ion batteries 42 CO -2 42 multiple biomass feedstocks 42 biogasoline 42 inefficient boilers 41 carbon emission 41 Integrated Gasification Combined Cycle 41 greenhouse polluter 41 SCIENCE MATTERS 41 heat trapping gasses 41 Plasma gasification 41 coal liquification 41 inorganic fertilizers 41 Compact Fluorescent Lamps CFLs 41 hydrogen fuel 41 petroleum 41 petrochemical feedstock 41 phosphor powder 41 Industrialised countries 41 oxyhydrogen 41 rank coals 41 nontoxic sulfur 41 biofuel feedstock 41 Desalinization 41 inefficient incandescent light 41 watt incandescent 41 Bioethanol 41 NASDAQ BLDP provides 41 burning stoves 41 conventional combustion engine 41 RenDiesel ® 41 manmade greenhouse gas 41 harmful byproducts 41 dimethyl ether 41 enrgy 41 patently unsustainable 41 compact fluorescent CFL bulbs 41 ozone depleting gases 41 Inc. NPWZ 41 Solutions eHs specializes 41 soy toners 41 Spinning flywheels 41 Carbon dioxide emitted 41 hydro carbons 41 lignocellulose 41 polymers petrochemicals 41 Fossil Fuels 41 coal gasification 41 de carbonisation 41 CarbonSMART ™ enterprise 41 cap andtrade 41 Rankine cycle 41 Carbon sequestration 41 myco diesel 41 Jan Kowalzig 41 Softwood hardwood 41 Ethanol 41 efficient cookstoves 41 smog forming pollutants 41 heaviest polluters 41 butane cartridges 41 burning gaseous fuels 41 sequestering carbon dioxide 41 jammer Hasik 41 electricity 41 hybrid Toyota Prius 41 cadmium telluride panels 41 Generic tramadol 41 stabilizing atmospheric concentrations 41 Ann Mesnikoff director 41 hybrids electrics 41 CO ₂ 41 NRG Reliant 41 algal biofuel 41 WyGen 41 unburnt fuel 41 ozone depleting substance 41 electrolyzers 41 hydrogen powered 41 RenDiesel fuel 41 cellulosic biomass 41 agrofuel 41 virtually inexhaustible 41 emmisions 41 lignocellulosic ethanol 41 magnetic ballasts 41 Protectionist measures 41 Vinod Khosla venture capitalist 41 en ergy 41 heat trapping gases emitted 41 cooking stoves 41 Andy Karsner 41 convert syngas 41 erect windmills 41 compact fluorescent lights 41 wean ourselves 41 biodiverse ecosystems 41 combined cycle IGCC 41 sequester carbon dioxide 41 Cellulose ethanol 41 biohydrogen 41 co2 emissions 41 HCFC 41 emmission 41 liquefied hydrogen 41 pollute 41 perfluorocarbons 41 reduce greenhouse gasses 41 integrated gasification 41 greenhouse emission 40 EarthWatts 40 Frank Gorke 40 beryllium oxide nuclear 40 wean itself 40 elemental chlorine 40 renewables hydro 40 lignite coal 40 sizes Derivatives.com combines 40 American Jianye 40 feedstocks 40 hybrids diesels 40 coalfired 40 combustion 40 MTBE additive 40 Alberta tar sands 40 betel leaf farming 40 GreenGen 40 electrically powered vehicles 40 biopower 40 offshore windpower 40 syngas 40 oilsands extraction 40 ecologically sound 40 reducing carbon emissions 40 alt fuels 40 inefficient lightbulbs 40 Fast breeder reactors 40 bioproduct 40 incandescent bulb 40 sulphate aerosols 40 chemical fertilizers 40 elemental mercury 40 transform CO2 emitted 40 bio butanol 40 ecologically destructive 40 Hythane 40 emission offsets 40 environmentally sound 40 sulphate particles 40 efficient compact fluorescent 40 operate inefficiently 40 efficient lightbulbs 40 sulfur sub bituminous 40 Bio DME 40 Zhang Guobao 40 Its N2Power brand 40 NASDAQ CLNE 40 AGW proponents 40 halogen bulbs 40 SNALP encapsulates siRNAs 40 Resilience Spur 40 desalinating seawater 40 sulfer 40 gasifies coal 40 heat trapping carbon dioxide 40 gas guzzling trucks 40 lubricants propane 40 mechanism CDM 40 ITER reactor 40 Soy biodiesel 40 Company Rentech SilvaGas 40 incandescents 40 carbon dioxide emissions 40 biomasses 40 finite resource 40 industrializing nations 40 combustors 40 carbon dioxide 40 noxious pollutants 40 David Sandalow 40 infinitely recyclable 40 Martin Schlageter 40 reduce carbon emissions 40 Daniel Kammen 40 pulverized coal 40 Carbon offsets 40 carbon emitter 40 ethanol methanol 40 cook stoves 40 carbon credits 40 additive MTBE 40 NASDAQ WPRT global 40 Hydrogen 40 environmentally beneficial 40 FGD gypsum 40 fuel additive MTBE 40 thermoelectricity 40 Seawater desalination 40 lithium titanate batteries 40 hydrofluorocarbon 40 compact fluorescent lamps CFLs 40 rapidly industrialising 40 trans fats gluten 40 #g/km CO2 [002] 40 coal petroleum coke 40 greenhouse emissions 40 engergy 40 pulping process 40 byproduct HFC 40 greenhouse gas emissions 40 lignocellulosic biomass 40 nonrenewable resource 40 Hydroelectric dams 40 iso octane 40 diesels 40 compact fluorescent lightbulbs 40 Syngas 40 Board ENEI 40 automotive catalytic converters 40 bio diesels syngas 40 sequester greenhouse gas 40 geosequestration 40 biodeisel 40 solar panels wind turbines 40 chemical fertilizers herbicides 40 biofuels cellulosic ethanol 40 gobar gas 40 papal indulgences 40 watt incandescent bulb 40 baseload 40 desalinization plants 40 incandescent fluorescent 40 greenhouse gas 40 NT Plasmatron 40 biogas 40 spew pollutants 40 petcoke 40 cleanest greenest 40 ultralow sulfur 40 feul 40 Jeff Deyette 40 dung charcoal 40 CFL compact fluorescent 40 sugars starches 40 effi cient 40 soy biodiesel 40 crystalline silicon PV 40 Homogeneous Charge Compression Ignition 40 MixAlco 39 EU recommits 39 biomass feedstock 39 Thar coal reserves 39 biochar 39 Corn syrup 39 curbing carbon emissions 39 Carbon Pollution 39 sulfur diesel fuel 39 Gas Emissions 39 li ion batteries 39 Carbon dioxide CO2 39 PHEVs 39 fermenting sugars 39 politically infeasible 39 fast breeder reactors 39 enviromentally friendly 39 Soy candles 39 Futuregen 39 methane emitted 39 distortionary 39 corn stalks switchgrass 39 industrialising nations 39 recyclable paperboard 39 fuelish 39 nonroad diesel 39 LPG CNG 39 super capacitors 39 Konarka Power 39 biorenewables 39 rice husk 39 hydrogen combustion engine 39 Athan Manuel 39 marketable byproducts 39 flexfuel vehicles 39 light emitting diodes LED 39 Aluminium smelting 39 hydrocarbons nitrogen oxides 39 Sulfur compounds 39 jatropha shrub 39 edible feedstocks 39 Biomass gasification 39 wood pellet heating 39 Concentrating solar 39 horribly inefficient 39 tar sands 39 CIGS panels 39 Heavily subsidized 39 emit greenhouse gasses 39 emmissions 39 smoggiest skies 39 feebates 39 Compact fluorescent lights 39 biomass biogas 39 carbon dioxide CO2 emission 39 oxygenate MTBE 39 GHG greenhouse gas 39 desalinization 39 Rentech Fischer Tropsch 39 FreedomCAR 39 reducing greenhouse gasses 39 Import substitution 39 sipping hybrids 39 nip deflationary forces 39 #yf 39 Yang Ailun 39 E# flex 39 hydrofluorocarbon HFC 39 Incandescent lamps 39 compact fluorescent bulbs 39 fuel guzzling 39 ecologically friendly 39 incandescent light bulb 39 petro dictators 39 environmentally friendly refrigerants 39 LFTR 39 willyoujoinus.com 39 Shallower quakes tend 39 O2Diesel ™ 39 solar geothermal biogas 39 Electric Vehicles EVs 39 Rentech Process 39 hopelessly inefficient 39 airship exploded 39 bio char 39 Aerosol particles 39 paraffin candles 39 BEVs 39 cottonseed oils 39 algae biofuel 39 Enriching uranium produces 39 biorefining 39 Clogged filters 39 Algae Biofuels 39 diesel engines 39 smokestack industries 39 absorbing carbon dioxide 39 anthropogenic emissions 39 nontoxic biodegradable 39 acoustic cavitation 39 Deron Lovaas 39 CO2 39 tungsten bulbs 39 Legalizing pot 39 agricultural residues 39 crystalline silicon panels 39 gasifying 39 nano cellulose 39 Meredosia Ill. 39 petrol guzzling 39 nitrogen oxide NOX 39 exhaust emissions 39 tailpipe exhaust 39 EEStor electrical 39 Artificial photosynthesis 39 reaping bonanza 39 Graetzel innovation 39 fissionable 39 seawalls irrigation 39 deplete ozone 39 Clear Skies Initiative 39 rechargeable lithium batteries 39 IGCC 39 nickel hydride batteries 39 nanotechnology supercomputing 39 powered lawn mowers 39 curb suburban sprawl 39 nonfood biofuels 39 GHG emitters 39 NGVs 39 algae biofuels 39 gob piles 39 coco biodiesel 39 gasifies 39 getting dirtier costlier 39 Claudia Kemfert 39 CLIMATE SPECTATOR 39 CAFÉ standards 39 mercury sulfur dioxide 39 greenhouse gases GHGs 39 GHG mitigation 39 resultant gooey 39 Ethanol blended 39 metallurgical coke urea 39 wood stoves 39 Still NIDA Volkow 39 desalinate water 39 bioethanol 39 CO ² 39 diesel powered 39 EROI 39 hybrid drivetrains 39 carbon capture 39 biocrude 39 harmful pollutants 39 industrialising 39 ener gy 39 algal biodiesel 39 hydrochlorofluorocarbons HCFCs 39 renewably powered 39 CO ² emissions 39 Pigovian 39 converting cellulose 39 Robert Mabro 39 corn stover wheat 39 gasified 39 -Frito Lay snack foods 39 Particulate pollution 39 Distillers grains 39 recycle CO2 emitted 38 Carryon bag fees 38 HCNG 38 fluorocarbons 38 WestStart CALSTART 38 hydraulic fracturing fracking 38 efficient compact fluorescents 38 Nick Nolte escapes 38 Perchlorates 38 hydrocarbon feedstock 38 compression ignition engines 38 thorium 38 sober Boole added 38 environmentally sustainable 38 cleaner 38 fiercer storms 38 Scramjets 38 R#a 38 greenhouses gases 38 uranium nitride 38 Energy LCOE 38 Pickens Plan 38 Ento Protein TM 38 copper bauxite kaolin 38 Manned spaceflight 38 cleanest safest 38 biomass feedstocks 38 Deborah Seligsohn 38 commissioner Gunther Oettinger 38 reduce NOx emissions 38 Clothes dryers 38 ViewScan produces 38 Gordon Quaiattini 38 Greenhouse gases trap 38 Guy Dauncey 38 microscopic bugs 38 vegetable oils 38 Hydrogen fluoride 38 biobased fuels 38 autogas 38 unmodified diesel 38 Fischer Tropsch fuels 38 House Gases GHG 38 watt incandescent light bulb 38 GE Jenbacher engines 38 fuel efficent 38 HPOWER 38 Low sulfur diesel 38 financialized 38 Therese Langer 38 emissions 38 bioenergy crops 38 thermal depolymerization 38 rapidly industrializing nations 38 biodiesel feedstocks 38 isobutanol 38 partially hydrogenated vegetable oils 38 emit pollutants 38 kerosene lamps 38 Kyoto Accords 38 Compressed Natural Gas 38 Erich Pica president 38 emit carbon monoxide 38 batteries supercapacitors 38 converts sunlight 38 co2 38 EnergyStar appliances 38 compact flourescent 38 pelletization 38 Embryonic cells 38 anhydrous ethanol 38 Xie Zhenhua vice 38 leave NoWaste TM 38 sequestration CCS 38 B5 biodiesel 38 sugarcane bagasse 38 hydrous ethanol 38 Ozone Depleting Substances ODS 38 Phyllis Cuttino director 38 bagasse cogeneration 38 monocropping 38 HFCs 38 lignocellulosic feedstocks 38 GHG reductions 38 Gerhard Schmidt 38 external combustion engines 38 Quayle Hodek 38 relocalization 38 Dan Kammen 38 environmentally 38 compressed natural 38 disposable alkaline batteries 38 saving lightbulbs 38 carbon sinks 38 nuclear fission 38 Direct Injection Spark Ignition 38 incandescent light 38 gaseous emissions 38 Global warming alarmists 38 switchgrass hardy 38 Zhang Guobao vice 38 Switchgrass 38 energyefficient 38 solar concentrators 38 combating global warming 38 particulate filters 38 ecomagination GE 38 carbon offsets 38 Buick LaCrosse Eco 38 Bioverda 38 cells DMFCs 38 marshmallow pies 38 Andrew J. Littlefair 38 Howard Learner 38 thermonuclear fusion 38 Inc. NACF commercializes 38 largest polymers petrochemicals 38 parabolic trough mirrors 38 heat trapping greenhouse gases 38 hydrotreating units 38 gas guzzling SUV 38 RedEye Supriya Doshi 38 chlorofluorocarbons CFCs 38 methanol 38 Deborah Seligsohn Beijing 38 Drevna 38 atomic reactors 38 Thorium 38 cookstove 38 globaloney 38 biofuel plantations 38 Rams Chevrolet Silverados 38 greenhouse gasses emitted 38 reduce greenhouse gas 38 Microalgae 38 licit crops 38 CFL lightbulbs 38 compact florescent 38 methane digesters 38 GDiesel ® 38 exhaustible resource 38 ILUC 38 Diesendorf 38 environmentally friendly LED lighting 38 Vegetable oils 38 compact fluorescent 38 emission 38 Low Carbon Fuel 38 Ford Fiesta ECOnetic 38 kerosene lanterns 38 fry grease 38 compressed sawdust 38 synthetic nitrogen fertilizer 38 CO2 emissions 38 Beating Smashing Looting 38 electric drivetrains 38 Industrialized nations 38 HCFC refrigerants 38 rapid industrialization 38 chemical fertilizers pesticides 38 wood burners 38 Daniel Mittler 38 FutureGen 38 microgenerators 38 formate salts 38 bright bustling metropolis 38 cogeneration plants 38 Vilas Muttemwar 38 Ford Focus ECOnetic 38 grass pine bark 38 ceramic brake pads 38 Adrian Bebb 38 hoofed critters 38 greenhouse gases GHG 38 oil 38 mercury vapor lights 38 greenpower 38 Gas guzzlers 38 REGULAR BASIS 38 ETBE 38 residue cellulosic biomass 38 tactically versatile 38 briquette 38 smokestack scrubbers 38 compact fluorescent bulb 38 Carbon Credits 38 chlorofluorocarbon 38 Patrick Serfass 38 AREDAY 38 Ravi Krishnaswamy 38 petrol guzzlers 38 Dave Nilles 38 rare earths 37 smokestack pollutants 37 cleanest internal combustion 37 biofuel N Viro 37 willow shrubs 37 International Thermonuclear Experimental Reactor 37 gas sipper 37 NGBF biofuel 37 propane U Haul 37 RenDiesel 37 econo mies 37 Hometown Matters 37 woodburning stoves 37 Carbon offsetting 37 dimmable CFL bulb 37 FFVs 37 Ultracapacitors 37 Excess nutrients 37 zero emission 37 David Roland Holst 37 liquefication 37 fusion fission 37 carbon monoxide colorless odorless 37 dispatchable 37 incandescent globes 37 irreversibly damaging 37 CSRV engines 37 Biomethane 37 nonsustainable 37 CO2 SO2 37 global warming gases emitted 37 gaseous fuels 37 de forestation 37 efficient Elantra sedan 37 Flexible Fuel Vehicles 37 Technological breakthroughs 37 Resources GRGR 37 R #A refrigerant 37 Mmamabula Coal Field 37 flexible OLEDs 37 propane Autogas 37 SCUD Single stage 37 Biochar 37 Orimulsion 37 Bi Polar Radio Frequency 37 Bio PDO TM 37 economically ruinous 37 Cattle ranching 37 ecologically unsustainable 37 chlorofluorocarbons 37 water evaporation retardant 37 unsecure unreliable energy 37 Ze Gen 37 nonfood feedstocks 37 Inc. www.rentechinc.com incorporated 37 industrial interruptible 37 peat lands 37 sequestering CO2 37 environ mentally 37 backsheets 37 E# gasohol 37 Renewable Diesel 37 polyunsaturated vegetable oils 37 solar photovoltaic cells 37 biodegradable plastics 37 tidal geothermal 37 superconducting materials 37 China Guodian Corp