Related by context. Frequent words. (Click for all words.) 62 biomass 58 flue gases 57 methane 57 biomass fuels 57 combustion 57 biomass gasification 56 carbon dioxide 55 greenhouse gasses 55 nitrous oxides 55 fossil fuel 54 nitrous oxide emissions 54 livestock manure 54 carbon dioxide CO2 54 crop residues 53 greenhouse gases 53 CO2 53 bioenergy 53 particulate matter emissions 53 biomass boilers 53 GHGs 53 biomass feedstock 53 agricultural residues 53 furans 53 particulate emissions 52 nitrogen oxides NOx 52 gasification 52 carbon dioxide emissions 52 pyrolysis 52 coal gasification 52 fossil fuels 52 renewable energy 52 cellulosic biomass 52 pollutants 52 syngas 51 GHG emission 51 Biomass 51 SOFC 51 carbon sequestration 51 Particulate matter 51 gasifier 51 greenhouse gas 51 anaerobic digesters 51 biogas 50 cogeneration 50 woody biomass 50 carbon dioxide emission 50 particulates 50 Carbon dioxide emissions 50 renewable 50 gases 50 waste incineration 50 integrated gasification 50 dioxide 50 biochar 50 carbon capture 50 pollutant 50 Carbon Dioxide 50 Sulfur dioxide 50 sulfur dioxide SO2 50 carbon emitting 49 Biogas 49 plasma gasification 49 greenhouses gases 49 microturbine 49 biogas plants 49 flue gas 49 biomass boiler 49 emissions 49 greenhouse gas GHG 49 coal fired 49 solar photovoltaics 49 pollutant emissions 49 GHG 49 emission 49 renewables 49 waste incinerators 49 soot particles 49 nitrogen oxide NOx 49 Longannet 49 solar thermal 49 combustor 49 carbon dioxide emitted 49 gaseous 49 biofuels 49 harmful pollutants 49 supercritical 49 NOx reduction 49 biomass feedstocks 49 anaerobic digestion 48 harmful gases 48 sequestration 48 Gasification 48 greenhouse gas emissions 48 particulate matter 48 bio fuels 48 PEM fuel 48 environmentally benign 48 emitting 48 incinerators 48 greenhouse gas emission reductions 48 NOx emissions