Related by context. Frequent words. (Click for all words.) 65 cellulosic ethanol 64 biofuels 63 cellulosic biofuels 63 cellulosic biofuel 62 corn ethanol 62 renewable fuels 62 biofuel 61 ethanol 61 Cellulosic ethanol 61 cellulosic feedstocks 60 alternative fuels 59 cellulosic 58 bio fuels 58 biobutanol 55 biodiesel 55 renewable 54 biomass 54 coal liquefaction 54 alternative energies 53 bioenergy 53 biobased 53 switchgrass 52 renewable energy 52 bio ethanol 52 feedstocks 52 synthetic fuels 51 bioethanol 51 biorefineries 51 Switchgrass 51 biomass feedstocks 51 biomass feedstock 50 fossil fuels 50 biorefinery 50 ZeaChem 50 cellulosic biomass 50 bio diesel 50 Virent 49 fossil fuel 49 cleaner fuels 49 woody biomass 49 Amyris 49 feedstock 48 Range Fuels 48 carbon sequestration 48 polluting fossil fuels 47 renewables 47 coal gasification 47 sugarcane ethanol 47 biobased products 46 wind turbines solar panels 46 fuels 46 isobutanol 46 liquid fuels 46 Fischer Tropsch 46 corn stover 46 sweet sorghum 46 hydrocarbon fuels 46 cellulose 46 cleaner burning 46 soy biodiesel 46 hydrogen 46 jatropha 46 Biofuel 45 Biofuels 45 Ethanol 45 energy 45 Drevna 45 MMgy 45 Qteros 45 agrofuels 45 biofuel crops 45 geothermal biomass 45 fuel 44 butanol 44 synfuel 44 biodegradable plastics 44 bioplastic 44 nonpolluting 44 curbing greenhouse gases 44 agricultural residues 44 Renewable Fuels Standard 44 nitrogen fertilizer 44 carbon emitting 44 FFVs 43 biomass fuels 43 camelina 43 flex fuel 43 renewable energies 43 polyol 43 sulfur fuels 43 hybrids 43 Bio Diesel 43 miscanthus 43 bioproducts 43 propylene oxide 43 Advanced Biofuels 43 E# ethanol 43 environmentally benign 43 greenhouse gas emitting 43 desalinization 43 commercially viable