Related by context. Frequent words. (Click for all words.) 85 biofuels 81 biofuel 74 alternative fuels 70 bio diesel 69 ethanol 68 renewable fuels 68 biodiesel 66 bioethanol 65 alternative energies 65 Biofuel 65 bioenergy 63 renewable energy 61 fossil fuels 61 biomass 61 renewable energies 60 cellulosic ethanol 58 Biofuels 58 jatropha 57 renewable 57 fossil fuel 56 cellulosic 56 liquid fuels 55 feedstocks 55 renewables 55 fuels 54 Jatropha 53 Ethanol 52 vegetable oils 52 feedstock 51 Renewable energy 51 switchgrass 51 palm oil 50 agriculture 50 organic farming 50 diesel 50 bioplastics 49 flex fuel 49 Bioenergy 49 biogas 49 sugarcane 48 Biodiesel 48 agro 48 genetically modified crops 48 agri 48 arable land 48 environmentally sustainable 48 fuel 48 cleaner burning 47 agricultural 47 hydrogen powered 47 Biomass 47 energy 47 fertilizers 47 agricultural commodities 47 sugar cane 47 carbon sequestration 47 soya 46 chemical fertilizers 46 environmentally friendly 46 carbon capture 46 reducing carbon emissions 46 carbon emission 46 reduce carbon emissions 46 corn 46 fuel additive 46 greenhouse gasses 45 Renewable 45 internal combustion engines 45 petroleum 44 photovoltaics 44 carbon dioxide emissions 44 carbon emissions 44 Renewable Energy 44 hydrogen 44 GMOs 44 diesel fuel 44 coal gasification 43 Renewables 43 greenhouse gases 43 Alternative Energy 43 climate change 43 crops 43 CO2 43 CO2 emissions 43 rapeseed 43 cropland 43 soy 42 hydrogen fuel 42 greenhouse gas emissions 42 greenhouse emissions 42 compressed natural 42 emission reduction 42 biotech crops 42 petrochemicals 42 E# [004] 42 carbon 42 aquaculture 42 carbon credits 42 soybean 41 sustainable 41 Fuels