No, not a horse-drawn carriage. How about an electric scooter?
Libert-e Motors' all-electric mopeds spout no emissions and take up less than half the space of a car. Available in two models, the One and the faster Xero, they might be the quietest and most energy-efficient way to see the New York skyline fly by.
Here's Mark Licea with the scoop on CNET's Green Show: