If you are at all concerned about the environment or even just worried about the rising cost of gasoline, you've probably wondered about the realities and promises of electric, hybrid electric, ethanol, biodiesel, propane (LPG), natural gas (CNG), hydrogen, even compressed air, and other alternative vehicle power technologies. There's another pair of alternatives you may or may not have consideredhuman-powered vehicles (HPV) and hybrid electric-assist human-powered vehicles. An HPV or perhaps an electric-assisted HPVthe other hybridmay be in your future. Forms of Human-Powered Vehicles HPV might seem like a fancy term for a bicycle, and it is. Nevertheless,…
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