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One of the company's biggest challenges is staying true to its green mission on the road. The electric delivery cars, made by NevCo, may save gas money but are unreliable and break down often. Before he can think about expanding his business, Bonahoom needs to find an inexpensive electric car big enough to carry his drivers and a set of pizza boxes. "That's a problem I have to solve if I want to continue down the path I'm on," he says. "If someone could figure out how to make a pizza delivery vehicle that's dependable and electric, there would definitely be a market for it."

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Last updated March 04 2008: 10:15 AM ET
Photographs by Mark Peterson/Redux for Fortune Small Business