The natural-gas powered Honda Civic GX is rated as the greenest car of 2007 by the EPA. But how--and where--do you fill it up? CNET Car Tech took a trip to the Idea House in San Francisco to check out Phill, the world's first natural-gas home-refueling station.
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2008 Honda Civic GX
Based on the gasoline-powered Honda Civic, the 2008 Civic GX features the world's cleanest combustion engine, according to the EPA, and is rated as an inherently low emission vehicle (ILEV).