Related by context. Frequent words. (Click for all words.) 59 sulfur dioxide emission 57 adipic acid 57 CO -2 56 elemental sulfur 56 nitrogen oxide NOx emissions 56 potent greenhouse gas 55 reduce NOx emissions 54 sulfur dioxide SO2 54 GHG emission 54 sulfur oxide 53 CO2 equivalents 53 sequester carbon dioxide 53 Carbon dioxide emissions 53 emits #g/km [002] 53 isoprene 53 CO ² 53 absorbs carbon dioxide 53 methane CH4 53 carbon dioxide 53 CO2 52 greenhouse gases GHG 52 greenhouse gases GHGs 52 algal biomass 52 phosphate fertilizer products 52 nitrous oxide emissions 52 atmospheric pollutants 52 co2 52 CO2 emission reduction 51 nitrous oxides 51 heat trapping gases emitted 51 sulfur dioxide nitrogen oxides 51 CO2 Emissions 51 smog forming 51 Methyl bromide 51 fluorocarbons 51 nitrogen fertilizers 51 reactive nitrogen 51 Nitrogen oxides 51 CO2 Capture 51 biomass combustion 51 mercury emitted 50 carbon dioxide CO2 50 Carbon sequestration 50 Caustic soda 50 Butadiene 50 CO ² emissions 50 Sulfur dioxide 50 carbon dioxide emission 50 greenhouse gas 50 greenhouse gasses 50 largest emitter 50 emissions 50 greenhouse emission 50 sulfur dioxides 50 kilotonnes 50 Burning fossil fuels 50 nitrogen NOx 50 greenhouse gases 50 Carbon Emissions 49 gases emitted 49 SO2 emissions 49 carbon dioxide concentrations 49 gaseous emissions 49 Volatile organic compounds 49 smog forming pollutants 49 emmissions 49 carbon emitted 49 dioxide 49 carbon dioxide emissions 49 CO2e 49 GHGs 49 Carbon Dioxide 49 pollutants emitted 48 Coal gasification 48 greenhouse emissions 48 Greenhouse Gases 48 ppmv 48 phosphate fertilizers 48 Activated Carbon 48 nitrification 48 tropospheric ozone 48 Acetic Acid 48 sulfur dioxide nitrogen oxide 48 soil salinity 48 unburned hydrocarbons 48 Particulate Matter 48 carbon emissions 48 Microalgae 48 ozone layer depletion 48 Carbon dioxide 48 CO2 emitted 48 Lignin 48 CO2 sequestration 48 greenhouse gas emissions 48 Co2 emissions 47 nitrogen trifluoride 47 nitrogenous 47 Bioethanol 47 sulfuryl fluoride 47 CO2 emissions 47 urea injection