Thanks for the link.
A big question is this: Honda just released a Civic which runs on compressed natural gas. The tank takes up half of the trunk and is compressed to 3500 PSI's. The range is about 220 miles per tank. Now how can a tank of JUST AIR get better then a large tank of highly compressed gas which is both under compress AND highly flammable in its own right?
http://autos.yahoo.com/honda_civic_g..._availability/ <---Civic GX Natural Gas car