Related by context. Frequent words. (Click for all words.) 67 environmentally friendly 64 greener 58 cleaner 56 eco friendly 55 Environmentally friendly 54 ecologically friendly 54 cleaner greener 53 cleaner burning 52 ecofriendly 51 cleaner fuels 50 environmentally sound 50 environmentally sustainable 50 environmentally conscious 50 efficient 49 ecologically sound 49 environmentally benign 49 cheaper 49 environmentally responsible 48 environmentally preferable 48 environmentally harmful 48 environmentally damaging 48 alternative fuels 47 Greener 45 healthier 45 Eco friendly 45 alternative 44 friendlier 44 costlier 44 environmentally 44 kinder 44 safer 43 Eco Friendly 43 biodegradable 43 alternative energies 43 bio degradable 43 tastier 43 renewable 43 economical 42 renewable fuels 42 environmentally unfriendly 42 newer 42 pricier 42 biofuels 42 bio fuels 42 simpler 42 environmental friendliness 42 polluting 41 dirtier 41 locally sourced 41 greenest 41 biofuel 41 eco conscious 41 tidier 41 quieter 41 recycled 41 biobased 41 fresher 40 conventional 40 hybrid 40 purer 40 fossil fuels 40 nontoxic 40 nicer 40 smarter 39 hybrids 39 wider aisles 39 creamier 39 expensive 39 bio ethanol 39 sleeker 39 internal combustion engine 39 internal combustion engines 39 renewable energy 39 carbon neutral 39 gentler 39 aesthetically pleasing 38 gas guzzling cars 38 cellulosic 38 alternatives 38 lighter 38 carbon emitting 38 environmentally sensitive 38 shinier 38 compact fluorescent bulbs 38 compressed natural 38 eco friendliness 38 brighter 38 automobiles 38 powertrains 38 biodiesel 38 Environmentally Friendly 38 retrofits 38 classier 38 combustion engines 38 organic fertilizers 37 kinder gentler 37 efficiency 37 recyclable 37 hydrogen powered 37 Energy Efficient 37 affordable