Related by context. All words. (Click for frequent words.) 88 CO2 86 carbon dioxide CO2 81 greenhouse gases 78 carbon dioxide emissions 76 greenhouse gas 76 greenhouse gasses 73 CO -2 72 CO ² 72 heat trapping carbon dioxide 71 methane 71 carbon dioxide emitted 71 carbon emissions 70 Carbon dioxide 70 sulfur dioxide 69 greenhouse gas emissions 69 CO2 emissions 68 GHGs 68 Carbon Dioxide 68 emissions 67 carbon emitted 67 Co2 67 potent greenhouse gas 67 CO2 emitted 66 carbondioxide 66 carbon dioxide CO2 emissions 65 atmospheric carbon dioxide 65 gases 65 greenhouses gases 65 greenhouse gases emitted 65 smog forming pollutants 65 carbon 64 Carbon dioxide CO2 64 heat trapping gases 64 C# emissions 64 CO ₂ 64 greenhouse emissions 64 pollutants 63 nitrogen 63 carbon dioxide emission 63 water vapor 63 sulphate aerosols 62 nitrous oxide N2O 62 gases emitted 62 ozone depleting gases 62 absorbs carbon dioxide 62 greenhouse gases GHG 62 GHG emissions 61 CO -2 emissions 61 GHG 61 mercury emitted 61 warming gases 61 anthropogenic carbon dioxide 61 sulfur dioxide SO2 61 Carbon dioxide emissions 61 nitrogen oxides 61 co2 61 carbon emission 60 nitrous oxide emissions 60 sulfur dioxide emissions 60 Greenhouse gases 60 SO2 60 pollutants emitted 60 atmospheric CO2 60 hoofed critters 60 Greenhouse gasses 60 gasses 60 nitrogen oxide 59 carbon dioxides 59 greenhouse gases GHGs 59 global warming gases 59 pollutant 59 sulphate particles 59 carbon dioxide concentrations 59 reduce carbon emissions 59 sequestering carbon dioxide 58 heat trapping pollutants 58 greenhouse gas GHG emissions 58 SO2 emissions 58 nitrogen oxides emitted 58 N2O 58 methane CH4 58 oxidized mercury 58 sulfate aerosols 58 methane emitted 58 emissons 58 sequester carbon dioxide 58 CO2 concentrations 58 harmful gasses 58 greenhouse gas emission 58 tailpipe gases 57 carbon dioxide methane 57 smog forming pollution 57 produced Friedlingstein 57 burning fossil fuels 57 emission 57 harmful pollutants 57 harmful gases 57 nitrogen trifluoride 57 Emissions 57 nitrogen oxide NOx emissions 57 emit CO2 57 carbon sinks 57 mercury emissions 57 sequester CO2 57 carbon dioxide CO2 emitted 57 CO2 emission 57 GhG emissions 57 anthropogenic CO2 57 nitrous oxides 57 hydrogen 57 greenhouse gas nitrous oxide 56 fossil fuels 56 emission reductions 56 pollution 56 noxious gasses 56 aerosol particles 56 absorb carbon dioxide 56 Carbon Dioxide CO2 56 fossil fuel 56 emitting greenhouse gases 56 biomass combustion 56 particulate emissions 56 NOx 56 heat trapping greenhouse gases 56 atmospheric pollutants 55 reducing carbon emissions 55 atmospheric CO 55 anthropogenic greenhouse gases 55 emit greenhouse gases 55 tropospheric ozone 55 CO2 equivalents 55 sequestering CO2 55 emmissions 55 tailpipe pollutants 55 gaseous emissions 55 CO2e 55 absorbing carbon dioxide 55 co2 emissions 55 flue gases 55 emit carbon dioxide 55 carbon dioxide CO ² 54 Methane 54 mercury sulfur dioxide 54 mercury pollution 54 pollutant emissions 54 oVOCs 54 ppmv 54 toxic pollutants 54 anthropogenic emissions 54 nitrogen oxide emissions 54 Burning fossil fuels 54 ozone O3 54 emit sulfur dioxide 54 ozone 54 terrestrial biosphere 54 tailpipe exhaust 54 cow burps 54 Co2 emissions 54 smog forming emissions 54 global warming gases emitted 54 atmospheric methane 54 reactive nitrogen 54 GHG emission 54 sulfuric acid mist 53 sulfur trioxide 53 nitrogen oxide NOX 53 carbon sequestration 53 sulfuric gases 53 CO2e emissions 53 gaseous pollutants 53 greenhouse emission 53 heat trapping emissions 53 underground geologic formations 53 greenhouse gas GHG 53 sulfur dioxide pollution 53 excrete methane 53 nitrogen oxides carbon monoxide 53 Nitrogen oxides 53 heat trapping gases emitted 53 sulfur dioxides 53 NOX emissions 53 heat trapping gasses 53 Sulfur Dioxide 53 smog forming gases 53 carbon emmissions 53 cow belches 53 smog forming chemicals 53 heat trapping 53 greenhouse gas concentrations 53 emitting fossil fuels 53 NOx emissions 53 nitrogen oxide emission 53 hydrofluorocarbons HFCs perfluorocarbons PFCs 53 greenhouse gasses emitted 53 nitrogen oxides NOx 53 emit GHGs 53 ozone depleting substance 53 carbon dioxide equivalent CO2e 52 polluting gases 52 hydrocarbons carbon monoxide 52 CO ² emissions 52 atmospheric CO2 concentrations 52 particulate matter emissions 52 N2O emissions 52 sequesters carbon dioxide 52 sequester carbon 52 saline aquifer 52 Nitrogen oxide 52 biosequestration 52 CO2 emmissions 52 automobile tailpipes 52 particulate soot 52 Nitrogen oxide emissions 52 hydrofluorocarbons HFCs 52 carbon sequestered 52 particulate matter 52 methane gas 52 NF3 52 fluorinated gases 52 tailpipe emissions 52 emission reduction 52 CO2 eq 52 sequester carbon emissions 52 smokestack emissions 52 absorbs CO2 52 dimethyl sulphide 52 smog forming nitrogen oxides 52 ozone depleting compounds 52 deplete ozone 52 airborne pollutants 52 methyl chloroform 52 nitrous oxide emission 52 nitrogen oxides NOx emissions 52 VOCs 52 Carbon sequestration 52 air pollution 52 carbon dioxide CO2 emission 52 emmisions 52 particulate matter soot 52 saline aquifers 52 Global Warming Potential GWP 51 Sulfur dioxide 51 smog forming 51 carbon emitters 51 fluorocarbons 51 ghg emissions 51 aerosols 51 chlorine peroxide 51 Tailpipe emissions 51 harmful particulates 51 smokestack pollutants 51 GHG emitted 51 dioxide 51 atmospheric CO2 levels 51 stratospheric ozone 51 ammonia 51 emmission 51 harmful vapors 51 Gigatonnes 51 cow farts 51 carbons 51 heat trapping greenhouse gas 51 emitting CO2 51 greenhouse gas emission reductions 51 biomass 51 sulfur gases 51 sulfurous gases 51 particulate pollutants 51 carbon capture 51 manmade CO2 emissions 51 #g CO2/km [001] 51 particulates 51 sulfur dioxide SO2 emissions 51 acid rain 51 reducing CO2 emissions 51 nitrogen oxide pollution 51 Sulphur dioxide 50 soot particulates 50 underground geological formations 50 unmineable coal seams 50 GHG concentrations 50 hydrofluorocarbon HFC 50 Nitrogen dioxide 50 nitrification 50 emitting carbon dioxide 50 exothermic reaction 50 atmospheric aerosols 50 ozone depleting chemicals 50 Carbon dioxide CO2 emissions 50 anthropogenic greenhouse gas 50 harmless nitrogen 50 anthropogenic CO 50 methyl chloride 50 cyclohexane 50 peat soils 50 particulate matter emitted 50 smokestack scrubbers 50 gigatonne 50 heat trapping carbon emissions 50 isoprene 50 Volatile Organic Compounds 50 Methane CH4 50 manmade greenhouse gases 50 carbondioxide emissions 50 sulfate aerosol 50 atmospheric nitrogen 50 sulfate particles 50 clathrates 50 gasifying coal 50 CFCs chlorofluorocarbons 50 ammonia NH3 50 carbon dioxide nitrous oxide 50 sooty particles 50 sulfur dioxide emission 50 particulate pollution 50 poisonous gasses 49 tailpipes smokestacks 49 fine particulates 49 Atmospheric CO2 49 gigatonnes 49 noxious pollutants 49 atmospheric CO2 concentration 49 HCFC 49 ozone depleting substances 49 dissolved solids 49 carbon emitting 49 hydrofluorocarbon 49 smog forming compounds 49 manmade greenhouse gas 49 CO2 Emissions 49 inert nitrogen 49 combustion gases 49 emits greenhouse gases 49 gigatons 49 saline formations 49 global warming 49 Greenhouse Gases 49 chlorofluorocarbons 49 flue gasses 49 mercury 49 peatlands 49 invisible odorless tasteless 49 Geologic Storage 49 unburned hydrocarbons 49 Kharecha 49 ozone depletion 49 Particulate pollution 49 Hydrogen Sulfide H2S 49 carbonic acid 49 carbonyl sulfide 49 cow flatulence 49 GhG 49 SO2 emission 49 dioxide emissions 49 sulfur hexafluoride SF6 49 perfluorocarbons 49 megatonne 49 microscopic bubbles 49 exhaled carbon dioxide 49 greenhouse gas emitters 49 HFC# 49 carbon monoxide particulate matter 48 harmful byproducts 48 harmful tailpipe emissions 48 harmful gases emitted 48 refrigerant 48 Carbon Dioxide CO 48 carbonate minerals 48 toxic gasses 48 sulfuryl fluoride 48 Sulfur dioxide emissions 48 Haber Bosch process 48 ppbv 48 chlorofluorocarbons CFC 48 global warming gasses 48 iron sulphate 48 Greenhouse Gas 48 decomposing manure 48 thawing Arctic permafrost 48 toxic chemicals 48 hydrogen sulfide 48 CO2 SO2 48 greenhouse warming 48 springtime ozone 48 smog soot 48 perfluorocarbons PFCs 48 sulfur dioxide SO2 nitrogen 48 anerobic 48 chlorofluorocarbon 48 sulfur dioxide pollutant 48 megatonnes 48 CO2emissions 48 methane burps 48 waste decomposes 48 flue gas 48 pollutant emission 48 sulfur oxide SOx 48 sulfur oxide 48 nitrogen dioxides 48 Carbon Monoxide CO 48 gaseous hydrogen 48 oxide hydrofluorocarbons perfluorocarbons 48 Diesel exhaust 48 elemental mercury 48 geological sequestration 48 CFCs 48 ozone particulate matter 48 toxic pollutant 48 Tropical deforestation 48 renewably 48 sequestering carbon 48 Nitrogen Oxide 48 diesel particulates 48 Sulfur compounds 48 radiative forcing 48 sequester carbon dioxide emissions 48 synthetic nitrogen fertilizer 48 volatile organic compounds 48 Earth biosphere 48 biofuel 48 chlorofluorocarbons CFCs 48 protective ozone layer 48 carbon dioxide emitter 48 methane clathrate 48 nutrient runoff 48 sulfur hexafluoride 47 nitrous oxide NOx 47 methane hydrates 47 CO2 sequestration 47 oxygen 47 polution 47 sulfates 47 inorganic mercury 47 gigaton 47 sequestered CO2 47 peat lands 47 SOx emissions 47 greenhouse gas emitting 47 permafrost melts 47 combustion 47 Emilie Moorhouse 47 biochar 47 hydrocarbons HC 47 upper troposphere 47 helium 47 superoxides 47 noxious gases 47 Lengai 47 tiny airborne particles 47 odorless colorless gas 47 pollutant particles 47 gaseous methane 47 noble gases 47 biogases 47 hydroxyl radical 47 Earth ozone layer 47 aerosol concentrations 47 underground coal seams 47 livestock manure 47 chlorofluorocarbon CFC 47 House Gases GHGs 47 Particulate emissions 47 Particulate Matter PM 47 CO 47 carbon emission reductions 47 nonrenewable resources 47 reduce NOx emissions 47 diesel particulate 47 CO2 emission reduction 47 emitted 47 longwave radiation 47 tailpipe emission 47 lithium hydroxide 47 combustion byproducts 47 nitrogen fertilizers 47 exhaust gases 47 sequesters carbon 47 coal fired 47 organic compounds 47 Greenhouse Gas GHG emissions 47 soot particles 47 carbon footprint 47 Sulfur Dioxide SO2 47 ozone layer depletion 47 vapor 47 HFC refrigerants 47 dissolved salts 47 nitrous oxide 47 geosequestration 47 CO2 CH4 47 GHG reduction 47 bovine flatulence 47 chlorine monoxide 47 phosphorus pollution 47 fine particulate pollution 47 Palaeocene Eocene Thermal Maximum 47 sulfur 47 gypsum byproduct 47 polluting 46 carbon monoxide 46 carbon sequestering 46 methane nitrous oxide 46 Storing carbon dioxide 46 Volatile Organic Compounds VOC 46 sulfur dioxide emitted 46 When plutonium decays 46 decarbonizing 46 #g/km CO2 [002] 46 hydrogen sulfide H2S 46 HFCs perfluorocarbons PFCs 46 particulate matter nitrogen oxides 46 ultrafine particles 46 hydrogen sulphide H2S 46 emitters 46 GHGs emitted 46 Fossil fuels 46 Carbon Emissions 46 nitrogen dioxide 46 polluters 46 Carbon dioxide emission 46 methane hydrate 46 Hydrofluorocarbons 46 heat trapping greenhouse 46 mercury potent neurotoxin 46 emission offsets 46 climate forcings 46 Sulfur dioxide pollution 46 ozone layer 46 phosphorus runoff 46 hydroxyl radicals 46 geo sequestration 46 trillion BTUs 46 tailpipe CO2 emissions 46 adipic acid 46 hydrocarbons 46 breathable oxygen 46 sediment 46 biofuels 46 marketable byproducts 46 photosynthetic organisms 46 teragrams 46 seafloor sediments 46 hydrochlorofluorocarbons HCFCs 46 soot 46 hydrochlorofluorocarbons 46 IGCC plants 46 greenhouse gas HFC 46 Zeebe 46 Nitrogen 46 fecal pellets 46 halocarbons 46 NOx nitrogen oxide 46 CH4 46 climate change 46 nitrogenous compounds 46 tropical deforestation 46 Carbon dioxide emitted 46 gasify coal 46 carcinogenic polycyclic aromatic hydrocarbons 46 nitric oxides 46 Biochar 46 Polycyclic aromatic hydrocarbons 46 Greenland icesheet 46 pollutants sulfur dioxide 46 sulphates 46 SF6 46 particles emitted 46 sulfolane 46 New Johnsonville Tenn. 46 Orbiting Carbon Observatory OCO 46 deplete oxygen 46 Pollutants 46 hydrological cycle 46 unburnt fuel 46 stabilizing atmospheric concentrations 46 atmospheric moisture 46 anaerobic decomposition 46 oxide sulfur hexafluoride 46 carbon dioxide methane nitrous 45 methane clathrates 45 deep saline aquifers 45 GHG greenhouse gas 45 exhale carbon dioxide 45 carcinogens benzene 45 odorous gases 45 particulate matter PM 45 marine phytoplankton 45 carbon dioxide sulfur dioxide 45 hydrocarbon vapors 45 biogenic emissions 45 nitrous oxides NOx 45 radioactive vapor 45 coal 45 tpy CO2e 45 shredder residue 45 exhaust emissions 45 emit pollutants 45 evaporative emissions 45 bacterial decomposition 45 displaces oxygen 45 ozone depleting 45 SO2 sulfur dioxide 45 Thawing permafrost 45 harmful dioxins 45 gasoline vapors 45 #,# butadiene 45 atmospheric concentrations 45 hydrogen H2 45 biomethane 45 GtC 45 calcium oxide 45 refrigerant gases 45 greenhouse gas emmissions 45 nitrous oxide NOx emissions 45 GHG reductions 45 Ultrafine particles 45 greenhouse gas GHG emission 45 thermal oxidizers 45 reduce SO2 emissions 45 photosynthesis 45 ozone particulates 45 carbon dioxide sequestration 45 stover 45 soot pollution 45 airborne particles 45 ethane propane butane 45 VOC emissions 45 elemental sulfur 45 ammonia borane 45 quadrillion BTUs 45 Ammonia 45 polluter 45 permafrost 45 ocean acidity 45 phosphorus 45 methyl cyanide 45 petrodiesel 45 boiling kettle 45 Meri Pori 45 Acid Rain Program 45 HCFCs 45 groundwater 45 CO ₂ emissions 45 hydrosphere 45 Ozone O3 45 CO2 emission reductions 45 Titan smoggy 45 Ross Salawitch 45 algal biomass 45 nitrogen dioxide emissions 45 greehouse gas 45 Elemental mercury 45 toxic dioxins 45 ozone depleting chlorofluorocarbons 45 ozone depleting refrigerant 45 biogenic 45 CO2/km 45 gases blamed 45 sulfur oxides 45 Hydrogen sulphide 45 nitrogen monoxide 45 RenDiesel fuel 45 Nuclear fission 45 methanogenic bacteria 45 Nitrogen Oxide NOx 45 stratospheric ozone depletion 45 gasified coal 45 kerogen 45 nonrenewable fuels 45 carbon credits 45 emit #g/km 45 decaying vegetation 45 ozone pollutant 45 poleward 45 smog forming nitrogen oxide 45 glacial interglacial cycles 45 sulfur dioxide nitrous oxide 45 rumen bacteria 44 permafrost thaws 44 Hydrogen Sulfide 44 cow enteric 44 carbon tetrachloride 44 anthropogenic 44 sulfur dioxide nitrogen oxide 44 forest thinnings 44 feebates 44 silicate rocks 44 sulfur dioxide nitrogen oxides 44 amine scrubbing 44 dangerous anthropogenic interference 44 Adequate ventilation 44 bicarbonate ions 44 PM# particles 44 #yf 44 spew pollutants 44 fossile fuels 44 carbon polluter 44 GHG emission reduction 44 carbon monoxide nitrogen oxides 44 Volatile organic compounds 44 electrochemical oxidation 44 oceans 44 ozone depleting refrigerants 44 carbon dioxide emission reductions 44 Cow burps 44 tonnes CO2e 44 nutrient pollution 44 Ozone depleting substances 44 Volcanic gases 44 Chlorofluorocarbons 44 airborne pollutant 44 Nitrogen Oxides 44 polyaromatic hydrocarbons 44 tholins 44 mantle convection 44 Stratospheric ozone 44 soil carbon sequestration 44 coal gasification 44 demineralized water 44 nitrogen fixation 44 fine particle pollution 44 combustible gases 44 hydrocarbons nitrogen oxides 44 geoengineering schemes 44 pollen particles 44 thermal inertia 44 photosynthetically 44 atmospheric 44 preindustrial times 44 Keeling Curve 44 legally binding pact obligating 44 outgas 44 inert gases 44 Plate tectonics 44 photochemical smog 44 heat trapping pollution 44 airborne particulates 44 sulfur compounds 44 refrigerant leakage 44 Ozone depletion 44 Le Quere 44 exhaust gasses 44 nutrient 44 decomposing trash 44 HCFC #b 44 toxins 44 molten salts 44 anthropogenic CO2 emissions 44 carcinogenic compounds 44 emis sions 44 Hydrogen Sulphide 44 hydrochlorofluorocarbon 44 Sulphur Dioxide 44 microscopic airborne particles 44 emit greenhouse gasses 44 nutrient discharges 44 hydrogen sulphide 44 Greenhouse Gas Emissions 44 ppm CO2 44 inorganic nitrogen 44 cement kiln 44 ammonia nitrogen 44 particulate matter sulfur dioxide 44 Hydrogen sulfide 44 albedo 44 atmospheric ozone 44 toxic hydrogen sulfide 44 volatiles 44 Particulate matter 44 carbonic 44 refrigerant leaks 44 GOSAT 44 nitrogen deposition 44 harmful toxins 44 microbial decomposition 44 Greenhouse Gasses 44 compressed air 44 nitrogen oxide sulfur dioxide 44 anammox 44 climatic variability 44 phosphine gas 44 biogeochemical cycle 44 Appy Sluijs 44 respired 44 greenhouse gas emitter 44 carbon monoxide nitrogen dioxide 44 icecaps 44 sulfur gasses 44 ozone pollution 44 harmful radiations 44 gaseous 44 oxidant 44 boron trifluoride 44 carbon offsets 44 Canadell 44 stratospheric ozone layer 43 sulfuric acid 43 troposphere 43 harmful contaminants 43 Coal gasification 43 dirtiest fossil 43 deca BDEs 43 oxidizing agent 43 absorption chiller 43 volcanic gases 43 nitrogen oxide NOx 43 Wiedinmyer 43 Ozone Depleting 43 Nitrous oxide 43 hydrologic cycle 43 nitrogen NOx 43 volcanic aerosols 43 biosphere 43 ethyl acrylate 43 martian atmosphere 43 manure decomposes 43 mammal extinctions 43 GHG emission reductions 43 hydro carbons 43 phytoplankton 43 trihalomethanes THMs 43 nitrate 43 emit 43 hazardous vapors 43 CO2 emitter 43 lunar soil 43 diesel exhaust 43 ozone precursors 43 HFC #a 43 sugars 43 hydrogen chloride 43 largest emitter 43 iso octane 43 sulfur dioxide SOx 43 HumiFilters 43 Anthropogenic 43 carbon monoxide nitrogen oxide 43 soot smog 43 oceanic circulation 43 chemically reactive 43 sulfur dioxide particulate matter 43 nitrogen leaching 43 methanol 43 hydrogen sulfide ammonia 43 sulfurous compounds 43 absorption chillers 43 Svedhem 43 ultra violet radiation 43 protons collide shattering 43 toxic methylmercury 43 manure 43 refrigerants 43 algae biomass 43 exhaust fumes 43 preindustrial levels 43 Volatile Organic Compounds VOCs 43 CarbonSMART ™ enterprise 43 spontaneously ignites 43 particulate contaminants 43 icesheets 43 Verified Emission Reductions 43 cocaine Valencia Arbalaez 43 carbon dioxide emitters 43 coccolithophores 43 acidifies 43 nitrogen fertilizer 43 argon atoms 43 peat bogs 43 Particulates 43 DBPs 43 unburned hydrocarbons carbon monoxide 43 oxidation catalysts 43 poisonous chlorine 43 melting permafrost 43 toxic gases 43 methyl isocyanate MIC 43 Biomethane 43 metal hydride 43 methanogenesis 43 microscopic soot 43 denitrification 43 atmospheric chemistry 43 nonrenewable fossil fuels 43 geologic sequestration 43 #g CO2/km [002] 43 bioethanol 43 chlorine atoms 43 Aerosols 43 farting cows 43 sulfur dioxide nitrogen dioxide 43 carbonator 43 allowances EUAs 43 singlet oxygen 43 ethanol butanol 43 silver iodide particles 43 axial tilt 43 carbon monoxide hydrocarbons 43 photochemical reactions 43 Charcoal stoves 43 carbon emitter 43 Mtoe 43 stringent emission 43 Amazonian forests 43 carbon dioxide nitrogen oxide 43 nitrogen dioxide carbon monoxide 43 airborne soot 43 hydrogen peroxide H#O# 43 Alstom chilled 43 hydrogen chloride HCl 43 nitrogen discharges 43 deoxygenated 43 GHG emitter 43 R #a refrigerant 43 cocaine alkaloid 43 hydrogen cyanide 43 coalfired power 43 fungal spores 43 terawatts 43 enteric fermentation 43 hydrogen fuel 43 putrid odors 43 Mitloehner 43 solvent vapors 43 liquid nitrogen fertilizer 43 geological formations 43 benzene carcinogen 43 polar regions 43 allergenic pollen 43 radioactive particles 43 Carbon Capture 43 sequester greenhouse gases 43 hydrofluoric acid 43 cupola furnace 43 monoxide 43 sulfate 43 Arctic thawing permafrost 43 cows burp 43 VOCs volatile organic compounds 43 Nature Geoscience journal 43 vinyl chloride 43 HFO #yf 43 argon 43 hydrogen ions 43 helium atoms 43 acetylene 43 ethane methane 43 dinitrogen 43 formaldehyde benzene 43 CFC refrigerants 43 curbing carbon emissions 43 phosphorus concentrations 43 NOx SOx 43 boreal ecosystems 43 cosmic ray flux 43 Methyl bromide 43 soot emitted 43 aboveground biomass 43 methane oxidation 43 geologic formations 43 persistent bio accumulative 43 sulfurated hydrogen 43 Greenhouse Gas Inventory 43 chlorine 43 finite fossil fuels 43 colorless odorless poisonous 43 halogenated gases 43 porous sandstone 43 regulate carbon dioxide 43 infrared photons 43 forestry residues 43 oxygen isotopes 43 Carbon Dioxide CO2 emissions 43 thermohaline circulation 43 Sequestration 43 anthropogenic aerosols 42 Sulfuryl fluoride 42 dioxides 42 chilled ammonia 42 carbon emission allowances 42 Inventory TRI 42 hydroxyl ions 42 reduce greenhouse gasses 42 conventional refrigerants 42 crop residues 42 CO2 emitting 42 Chlorofluorocarbons CFCs 42 hazardous chemicals 42 thermochemical processes 42 contaminants 42 landfills 42 nicotine vapor 42 reduce greenhouse gas 42 Arctic permafrost 42 radioactive material 42 degrees above preindustrial 42 biogas 42 nitrous oxide N2O hydrofluorocarbons 42 Hydrogen 42 manure lagoons