Related by context. Frequent words. (Click for all words.) 73 Hybrid Vehicles 70 Hybrid Cars 68 Hydrogen Fuel Cell 67 Electric Vehicle 64 PHEV 64 Fuel Efficient 62 Fuel Efficiency 62 Hybrid 61 Gas Mileage 60 Prius Plug 60 Hybrid Electric 60 Fuel Economy 60 Medium Duty 60 Diesel Engines 59 Sustainable Mobility 59 Flex Fuel 59 Volt 58 hybrid electric 58 hydrogen internal combustion 58 Chevy Volt 58 Fuel Cell 58 ActiveE 58 Lithium Ion Battery 58 Mitsubishi i MiEV 58 FlexFuel 57 Alternative Fuel 57 PHEVs 57 HEVs 57 Stability Control 57 Concept Car 57 Electric Vehicles 57 FCVs 57 hybrid powertrains 57 BlueTec 56 BEVs 56 Electric Vehicle Charging 56 Wheego 56 MINI E 56 ZEV 56 Honda FCX Clarity 56 Emissions Reduction 56 iMiEV 56 Transit Connect Electric 56 hybrid powertrain 56 Automatic Transmission 55 Turbocharged 55 Honda FCX 55 Mode Hybrid 55 Vehicle 55 Chevrolet Volt 55 Alternative Fuels 55 Lexus CT #h 55 Diesel Engine 55 EVs 55 Battery Powered 55 RAV4 EV 55 CO2 Emissions 55 Fuel Consumption 55 Smart Fortwo 55 Zero Emissions 54 Lincoln MKZ Hybrid 54 Fuel Cells 54 Zero Emission 54 Challenge Bibendum 54 Nissan LEAF 54 Nissan Leaf 54 smart fortwo electric 53 #.#L V8 #V MPFI 53 Lexus RX#h 53 Hybrids 53 Ford Transit Connect 53 #.#L I4 #V MPFI 53 hybrid drivetrain 53 ePower 53 Reduce Emissions 53 Fortwo 53 Dual Fuel 53 PHV 52 Carbon Offset 52 FreedomCAR 52 HEV 52 Panamera S 52 Energy Efficient 52 Toyota Highlander Hybrid 52 Fisker Karma 52 microcar 52 diesels 52 electric drivetrain 52 Bluetec 52 Outlander Sport 52 smart fortwo 52 diesel powered 52 #.#L V8 #V 52 Hydrogen 52 hybrids 51 BioPower 51 BMW #d 51 electric powertrain 51 AuraGen 51 Ford EcoBoost 51 PEVs