[TennTradition]

Milo...I didn't see in the links any discussion about the miles/kg of CNG for a car like the Honda. I searched around some...and I see that you can get about 180-200 miles on a tank...but I couldn't find the volume and maximum storage pressure in the tank so that I could see how many miles/kg that is.

I would need that to be sure and give exact numbers - but low emissions doesn't necessarily mean global warming friendly - though natural gas is more environmentally friendly in general than gasoline.

Also, the energy independence you bring up is important. While if we were to actually convert a large portion of our auto fleet to CNG it could mean we could no longer produce such a sizable fraction of the natural gas we use - friendly nations like Norway are large natural gas suppliers.

P.S. Thanks for putting all of this together. If I can find a little more info, there will be some "fun" calculations to do...