Do your part and be smart!
Consider the "Smart Car" for great mileage but little safety.
http://dcist.com/attachments/dcist_s...y_smartcar.jpg
Or consider the Smorche if you want some speed
http://t3.gstatic.com/images?q=tbn:A..._F3luZA9hbzjpd
But if you really want to go all out, try the Smustang.
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http://techpatio.com/wp-content/uploads/Smustang.gif