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These all-electric, no-emissions scooter are already a staple in some European cities, but it might take a lower price tag for the Vetrix to catch on here. At $11,000, the bike is far more expensive than similarly-size, gas-powered models. So, while you're saving serious money at the pump - it costs pennies per gallon - that initial price forces you to play catch-up. Still, if a company's going to try to sell people an $11,000 all-electric scooter, San Francisco's probably the place to do it.—Gregory Mone