8. Hybrid Car
   A hybrid vehicle, also known as a hybrid electric car, combines a fuel-efficient gas engine with an electric motor powered by batteries
   http: //greenstudentu.com/Hybrid.aspx
   
   
9. Hydrogen car
   A hydrogen car is an automobile which uses hydrogen..
   http: //academickids.com/encyclopedia/index.php...
   
   
10. Teachers Corner: Alternative-Fuel Vehicles
    http: //earthday.net/howto/tc-fuels.stm
    
    
11. Welcome to the Electric Vehicle Association of Washington DC
    Official site of the Electric Vehicle Association of Greater Washington D.C., a chapter of the Electric Auto Association
    http: //evadc.org/
    
    

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