Here's a possible scenario. Honda builds about 1,000 Civic GXs a year and supply is short. Those are sold in California and New York only - states with strict environmental standards. Spokane Community College, which is in Washington State (not California or New York), wants to buy a fleet of GXs, as they have lots of CNG there, but the order is denied. Conspiracy! Or not. Maybe it costs Honda a bit more to make these than normal Civics. Maybe there really aren't enough of them to go around. We hope the cars become more widely available, but for now they aren't. Phill was just sold to Clean Energy Fuels, which could make them more prominent, but kills the idea that Honda is only interested in limiting its use. Feel free to read the whole thing here.
[Source: The Auto Channel / Edwin Black]