Related by context. Frequent words. (Click for all words.) 68 electric hybrid 63 hybrids 56 diesels 56 EVs 55 Prius 53 Civic Hybrid 53 Prius hybrid 51 hybrid 51 Toyota Prius hybrid 51 Toyota Prius 50 Hybrids 50 minicar 49 diesel engines 49 hybrid electric 48 zero emission 48 Honda Insight 48 Chevrolet Volt 48 Nissan Leaf 48 Elantra 48 Chevy Volt 48 hybrid powertrain 47 SUVs 47 hydrogen powered 47 PHEVs 47 alternative fuels 47 Mazda3 46 midsize sedan 46 CR Z 46 flex fuel 46 Volt 46 RAV4 46 powertrains 45 subcompacts 45 Lithium ion batteries 45 sedans 44 subcompact 44 exhaust emissions 44 Mercury Milan 44 hatchbacks 44 combustion engines 44 Honda Motor Co 44 combustion engine 44 CR V 43 lithium ion batteries 43 Prius hybrids 43 diesel powered 43 internal combustion engines 43 Priuses 43 diesel 43 luxury sedans 43 internal combustion engine 43 gas guzzlers 43 Toyota Motor Corp. 42 automakers 42 Tesla Roadster 42 Mazda6 42 Ford Escape Hybrid 42 hatchback 42 Camrys 42 diesel engine 42 electrics 42 cars 42 i MiEV 42 hydrogen fuel 42 Lexus RX 42 Camry 41 Honda Fit 41 internal combustion 41 liter diesel 41 nickel metal hydride 41 Toyota RAV4 41 crossover SUV 41 cleaner fuels 41 powerplants 41 CUV 41 coupes 41 Frankfurt Motor 41 compact sedan 41 g km 41 Toyota Yaris 41 tailpipe emissions 41 PHEV 41 vehicles 41 supermini 41 Hybrid 40 door hatchback 40 #.# liter V6 40 gas guzzling vehicles 40 Sportage 40 Mazda2 40 cleaner burning 40 plug ins 40 Jetta 40 Cadillac CTS 40 mpg 40 Cruze 40 compressed natural 40 Honda Motor Co. 40 #g/km [002] 40 EcoBoost 40 Tiguan