Who place else but Seattle to lead the charge on Hybrid buses:

Seattle's Transit District Buys 235 Hybrid Buses
King County, Wash., which includes Seattle, plans to buy 235 diesel hybrid buses for its transit system, one of the largest orders for city buses with hybrid technology, according to the New York Times. The King County Metropolitan Transit Authority plans to spend about $47 million more for the hybrids than it would have for conventional diesel buses. County managers say they think they will save $27 million over 12 years by using less fuel and oil and reducing maintenance costs, though savings from new technologies can be hard to predict.