Above is another video from my trip to AltWheels Boston 2007. The video is a look at the Phill home refueling station, topping off a Honda Civic GNG (Compressed Natural Gas) car. Natural gas cars are actually the cleanest cars you can buy today, even cleaner than hybrids, but they just don't get the credit they deserve. The reason for the lack of recognition for CNG is they have major problems: natural gas is not available everywhere, for example, and CNG cars cost an extra $7,000 (that's without tax rebates) compared with a normal gas car. If the gas prices keep going up and battery technology promises never pan out though, CNG cars just might have to play a bigger role than many expect.