Related by context. Frequent words. (Click for all words.) 58 renewable fuels 55 liquefied coal 54 alternative fuels 50 Renewable Fuels Standard 49 cleaner burning 48 cleaner fuels 48 cellulosic feedstocks 48 smog forming pollutants 47 fleetwide average 46 ethanol 46 fossil fuels 46 Nortel remedial 46 biofuels 46 bio fuels 46 renewable energy 45 corn ethanol 45 bd.className = bd.className.replace overflow 45 additive MTBE 44 renewable feedstocks 44 Renewable fuels 44 renewables 44 cellulosic biofuels 44 gas guzzling vehicles 44 Renewable Electricity 44 renewable 43 fossil fuel 43 polluting fossil fuels 43 Renewable Fuel 43 renewable energies 43 Cellulosic ethanol 43 biofuel 43 FRAC Act 42 E# pumps 42 EPAct 42 cellulosic materials 42 propane autogas 42 cellulose ethanol 42 retool factories 42 Biomass Crop Assistance Program 42 By DUSTIN BLEIZEFFER 42 Energy ARPA E 42 Waxman Markey climate 42 Posted -# sec 42 FFVs 42 VEETC 41 #,#,# MW 41 artificial fertilizers 41 decarbonisation 41 tailpipe standards 41 GWe 41 biofuel crops 41 alternative energies 41 Million Solar Roofs 41 rapid industrialization 41 biodiesel blends 41 greenhouse gas emitting 41 curbing carbon emissions 41 hybrid powertrains 41 CAFE standards 41 wind turbines solar panels 41 B# biodiesel [002] 40 #GW [002] 40 hydro geothermal 40 biomass geothermal 40 Pickens Plan 40 NGVs 40 bio diesel 40 'S PAID FOR 40 cellulosic ethanol 40 petrochemical feedstock 40 cellulosic 40 energy 40 #,#-#,# MW 40 biodiesel 40 #mn tonnes 40 CNG fueling stations 40 Sales excluding autos 40 diesel 40 ethanol methanol 40 conventional internal combustion 40 synfuels 40 CO ² emissions 39 low sulfur diesel 39 smog forming nitrogen oxides 39 Renewable Portfolio Standard 39 soybean oils 39 carbon emission reductions 39 watt incandescent 39 flex fuel 39 FreedomCAR 39 sulfur fuels 39 petroleum refiners 39 petro diesel 39 nondefense discretionary spending 39 biofuel feedstocks 39 vehicles PHEVs 39 gigajoules 39 xylose 39 vehicles HEVs 39 gas guzzling trucks 39 hybrid electric